{"title":"Air Flow Research","description":"","products":[{"product_id":"afr0908","title":"AFR 23 SBC Cylinder Head 180cc LT1 Reverse Cool Heads. 65cc chambers. L98 angle","description":"\u003cp\u003eAFR0908\u003c\/p\u003e\n\u003cp\u003eAFR’s 180cc “Street” heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street\/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Component upgrade and machining options are available to customize AFR Heads to your specific build. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/180cc-sbc-lt1-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e180cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=286\" class=\"prodlink\"\u003e0908\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=285\" class=\"prodlink\"\u003e0909\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e54cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"5\"\u003e\u003cstrong\u003e180cc Street Head Flow Chart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e138\u003c\/td\u003e\n\u003ctd\u003e198\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e190\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e180cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.050\" H x 1.250\" W x 5\/16° Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120 thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.810 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133114757233,"sku":"AFR0908","price":3398.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__45804.1470873055.500.290_043b3535-eb13-40cd-91ed-39057a3ce5f6.png?v=1683921824"},{"product_id":"afr0908np","title":"AFR 23 SBC Cylinder Head 180cc LT1 Reverse Cool Heads. 65cc chambers. L98 angle","description":"\u003cp\u003eAFR0908NP\u003c\/p\u003e\n\u003cp\u003eAFR’s 180cc “Street” heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street\/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Component upgrade and machining options are available to customize AFR Heads to your specific build. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/180cc-sbc-lt1-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e180cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=286\" class=\"prodlink\"\u003e0908\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=285\" class=\"prodlink\"\u003e0909\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e54cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"5\"\u003e\u003cstrong\u003e180cc Street Head Flow Chart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e138\u003c\/td\u003e\n\u003ctd\u003e198\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e190\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e180cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.050\" H x 1.250\" W x 5\/16° Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120 thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.810 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133114822769,"sku":"AFR0908NP","price":3036.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__45804.1470873055.500.290_9e9c00b4-54a0-4cb5-aac6-ebe63f576ed0.png?v=1683921865"},{"product_id":"afr0909","title":"AFR 23 SBC Cylinder Head 180cc LT1 Reverse Cool Heads. 54cc chambers. L98 angle","description":"\u003cp\u003eAFR0909\u003c\/p\u003e\n\u003cp\u003eAFR’s 180cc “Street” heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street\/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Component upgrade and machining options are available to customize AFR Heads to your specific build. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/180cc-sbc-lt1-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e180cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=286\" class=\"prodlink\"\u003e0908\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=285\" class=\"prodlink\"\u003e0909\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e54cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"5\"\u003e\u003cstrong\u003e180cc Street Head Flow Chart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e138\u003c\/td\u003e\n\u003ctd\u003e198\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e190\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e180cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.050\" H x 1.250\" W x 5\/16° Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120 thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.810 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133114855537,"sku":"AFR0909","price":3398.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__45804.1470873055.500.290.png?v=1683921728"},{"product_id":"afr0909np","title":"AFR 23 SBC Cylinder Head 180cc LT1 Reverse Cool Heads. 54cc chambers. L98 angle","description":"\u003cp\u003eAFR0909NP\u003c\/p\u003e\n\u003cp\u003eAFR’s 180cc “Street” heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street\/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Component upgrade and machining options are available to customize AFR Heads to your specific build. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/180cc-sbc-lt1-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e180cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=286\" class=\"prodlink\"\u003e0908\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=474\u0026amp;attribute%5B749%5D=285\" class=\"prodlink\"\u003e0909\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e54cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"5\"\u003e\u003cstrong\u003e180cc Street Head Flow Chart\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e138\u003c\/td\u003e\n\u003ctd\u003e198\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e190\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e180cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.050\" H x 1.250\" W x 5\/16° Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120 thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.810 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133114888305,"sku":"AFR0909NP","price":3036.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__45804.1470873055.500.290_07246512-f7b6-4ec2-bccb-d4759af454c7.png?v=1683921781"},{"product_id":"afr1002","title":"AFR 23 SBC 195cc Enforcer As Cast Straight Plug 64cc chambers NO PARTS","description":"\u003cp\u003eAFR1002\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc SBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location\/performance. This budget friendly head is perfect for your 350 to 400 Cubic Inch operating below 6000 RPM.\u003c\/p\u003e\n\u003cp\u003eThey come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups our one piece 8mm 21 4N Stainless Steel valves. They are available in straight or angle plug and bare without any parts for the DIY. Sold as a single piece, 2 are required per engine.\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-enforcer-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum As Cast SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=517\u0026amp;attribute%5B884%5D=319\u0026amp;attribute%5B886%5D=322\" class=\"prodlink\"\u003e1001\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight Plug, Assembled\u003c\/td\u003e\n\u003ctd\u003e64cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=517\u0026amp;attribute%5B884%5D=319\u0026amp;attribute%5B886%5D=321\" class=\"prodlink\"\u003e1002\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight Plug, No Parts\u003c\/td\u003e\n\u003ctd\u003e64cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=517\u0026amp;attribute%5B884%5D=320\u0026amp;attribute%5B886%5D=322\" class=\"prodlink\"\u003e1006\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle Plug, Assembled\u003c\/td\u003e\n\u003ctd\u003e64cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=517\u0026amp;attribute%5B884%5D=320\u0026amp;attribute%5B886%5D=321\" class=\"prodlink\"\u003e1007\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle Plug, No Parts\u003c\/td\u003e\n\u003ctd\u003e64cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle, Fits either center or perimeter bolt valve cover.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"7\"\u003e195cc As Cast Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e133\u003c\/td\u003e\n\u003ctd\u003e188\u003c\/td\u003e\n\u003ctd\u003e226\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003ctd\u003e251\u003c\/td\u003e\n\u003ctd\u003e251\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e104\u003c\/td\u003e\n\u003ctd\u003e138\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e186\u003c\/td\u003e\n\u003ctd\u003e191\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable width=\"100%\" data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" class=\"descrip\" data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMaterial\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e2.080\" H x 1.270\" x 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e76cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.380\" H x 1.420\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Angle\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.600\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eWarning:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.450\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eFlat Mill\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.006\" per cc 56cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115379825,"sku":"AFR1002","price":591.06,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/AFR-1006-2__14352.1575505414.500.290_9e585065-15b6-4963-8fdc-c066afbc748e.png?v=1683921528"},{"product_id":"afr1006","title":"AFR 23 SBC 195cc Enforcer As Cast Angle Plug 64cc chambers Assembled","description":"\u003cp\u003eAFR1006\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc SBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location\/performance. This budget friendly head is perfect for your 350 to 400 Cubic Inch operating below 6000 RPM.\u003c\/p\u003e\n\u003cp\u003eThey come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups our one piece 8mm 21 4N Stainless Steel valves. They are available in straight or angle plug and bare without any parts for the DIY. Sold as a single piece, 2 are required per engine.\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-enforcer-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.080\" H x 1.270\" x 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e76cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.380\" H x 1.420\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.600\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.450\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 56cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115412593,"sku":"AFR1006","price":957.56,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/AFR-1006-2__14352.1575505414.500.290_ef73dce3-1514-4b84-a8f8-07f960bd13cd.png?v=1683921422"},{"product_id":"afr1007","title":"AFR 23 SBC 195cc Enforcer As Cast Angle Plug 64cc chamber NO PARTS","description":"\u003cp\u003eAFR1007\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc SBC Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location\/performance. This budget friendly head is perfect for your 350 to 400 Cubic Inch operating below 6000 RPM.\u003c\/p\u003e\n\u003cp\u003eThey come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups our one piece 8mm 21 4N Stainless Steel valves. They are available in straight or angle plug and bare without any parts for the DIY. Sold as a single piece, 2 are required per engine.\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-enforcer-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.080\" H x 1.270\" x 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e76cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.380\" H x 1.420\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.600\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.450\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 56cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115445361,"sku":"AFR1007","price":591.06,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/AFR-1006-2__14352.1575505414.500.290.png?v=1683921293"},{"product_id":"afr1031","title":"AFR 23 SBC Cylinder Head 195cc Street LT4 Reverse Cool Heads. 65cc chambers. ang","description":"\u003cp\u003eAFR1031\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-lt1-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=475\u0026amp;attribute%5B756%5D=286\" class=\"prodlink\"\u003e1031\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=475\u0026amp;attribute%5B756%5D=285\" class=\"prodlink\"\u003e1032\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e54cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115478129,"sku":"AFR1031","price":3398.09,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__36224.1470873060.500.290_f1759fcd-f07d-4295-84fe-1603fc19e9ae.png?v=1683925236"},{"product_id":"afr1032","title":"AFR 23 SBC Cylinder Head 195cc Street LT4 Reverse Cool Heads. 54cc chambers. ang","description":"\u003cp\u003eAFR1032\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-lt1-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=475\u0026amp;attribute%5B756%5D=286\" class=\"prodlink\"\u003e1031\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=475\u0026amp;attribute%5B756%5D=285\" class=\"prodlink\"\u003e1032\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT1\u003c\/td\u003e\n\u003ctd\u003e54cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115543665,"sku":"AFR1032","price":3599.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__36224.1470873060.500.290.png?v=1683925180"},{"product_id":"afr1034","title":"AFR 23 SBC Cylinder Head 195cc Street Heads. straight plug w\/heat riser. 65cc. A","description":"\u003cp\u003eAFR1034\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. This product is street legal in 50 states for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1034\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1036\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1038\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1040\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\u0026amp;attribute%5B204%5D=152\" class=\"prodlink\"\u003e1041\u003c\/a\u003e*\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle, Fits either center or perimeter bolt valve cover.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eD-250-2\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115609201,"sku":"AFR1034","price":3167.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc_Street__59629.1449253423.500.290_ed5a36c2-1ca0-4d92-9024-a8d341aff86e.png?v=1683925057"},{"product_id":"afr1036","title":"AFR 23 SBC Cylinder Head 195cc Street Heads. straight plug w\/heat riser. 75cc. A","description":"\u003cp\u003eAFR1036\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. This product is street legal in 50 states for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1034\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1036\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1038\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1040\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\u0026amp;attribute%5B204%5D=152\" class=\"prodlink\"\u003e1041\u003c\/a\u003e*\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle, Fits either center or perimeter bolt valve cover.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003c\/p\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\n\u003ctable width=\"100%\" data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" class=\"descrip\" data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMaterial\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Angle\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eWarning:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eFlat Mill\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eAngle Mill\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eNote:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eCarb EO#\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eD-250-2\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115707505,"sku":"AFR1036","price":3167.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc_Street__59629.1449253423.500.290_1c6fb6a3-5156-49a4-b6aa-63f46211a21b.png?v=1683925113"},{"product_id":"afr1038","title":"AFR 23 SBC Cylinder Head 195cc Street Heads. L98 angle plug w\/heat riser. 75cc.","description":"\u003cp\u003eAFR1038\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. This product is street legal in 50 states for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1034\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1036\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1038\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1040\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\u0026amp;attribute%5B204%5D=152\" class=\"prodlink\"\u003e1041\u003c\/a\u003e*\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle, Fits either center or perimeter bolt valve cover.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eD-250-2\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133115936881,"sku":"AFR1038","price":3167.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc_Street__59629.1449253423.500.290_28de794b-89dd-4e05-a855-e22a8870b2dc.png?v=1683924992"},{"product_id":"afr1039-716","title":"AFR 23 SBC Cylinder Head 195cc LT4 Reverse Cool Competition Package Heads. 65cc","description":"\u003cp\u003eAFR1039-716\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Competition\" heads are the preferred choice for a more aggressive street or street\/strip build. They feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500-6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-lt4-competition-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Competition Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=476\u0026amp;attribute%5B763%5D=286\" class=\"prodlink\"\u003e1039-716\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"7\"\u003e195cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e151\u003c\/td\u003e\n\u003ctd\u003e211\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e293\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e308\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125\u003c\/td\u003e\n\u003ctd\u003e172\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003csection id=\"faq\" class=\"section_style\"\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\n\u003ctable width=\"100%\" data-mce-fragment=\"1\"\u003e\n\u003ctbody data-mce-fragment=\"1\"\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" class=\"descrip\" data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMaterial\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e2.185\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.460\" H x 1.565\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Angle\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eWarning:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eFlat Mill\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eAngle Mill\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr data-mce-fragment=\"1\"\u003e\n\u003ctd colspan=\"2\" data-mce-fragment=\"1\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e1.920 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\" data-mce-fragment=\"1\"\u003e\n\u003ctd data-mce-fragment=\"1\"\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd data-mce-fragment=\"1\"\u003e\n\u003cdiv align=\"right\" data-mce-fragment=\"1\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116002417,"sku":"AFR1039-716","price":4622.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__43081.1470873084.500.290_73c3a7d6-e0e6-4fd4-be49-373fa6f6480d.png?v=1683923859"},{"product_id":"afr1040","title":"AFR 23 SBC Cylinder Head 195cc Street Heads. L98 angle plug w\/heat riser. 65cc c","description":"\u003cp\u003eAFR1040\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. This product is street legal in 50 states for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1034\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1036\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1038\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1040\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\u0026amp;attribute%5B204%5D=152\" class=\"prodlink\"\u003e1041\u003c\/a\u003e*\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle, Fits either center or perimeter bolt valve cover.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eD-250-2\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116067953,"sku":"AFR1040","price":3167.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc_Street__59629.1449253423.500.290_e58caa4e-1b18-4398-9cdf-e469cd490e89.png?v=1683924625"},{"product_id":"afr1041","title":"AFR 23 SBC Cylinder Head 195cc Street Head W\/72 Angle Intake Bolts. L98 angle pl","description":"\u003cp\u003eAFR1041\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. This product is street legal in 50 states for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Street\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500 RPM. This product is street legal in 50 states for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-street-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"3\"\u003e195cc Aluminum SBC Street Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1034\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=129\" class=\"prodlink\"\u003e1036\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStraight\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=272\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1038\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\" class=\"prodlink\"\u003e1040\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=425\u0026amp;attribute%5B703%5D=271\u0026amp;attribute%5B203%5D=130\u0026amp;attribute%5B204%5D=152\" class=\"prodlink\"\u003e1041\u003c\/a\u003e*\u003c\/td\u003e\n\u003ctd\u003eAngle\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e*For 1987-1995 with 72° bolt angle, Fits either center or perimeter bolt valve cover.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"6\"\u003e195cc Street Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e146\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e247\u003c\/td\u003e\n\u003ctd\u003e275\u003c\/td\u003e\n\u003ctd\u003e280\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e119\u003c\/td\u003e\n\u003ctd\u003e166\u003c\/td\u003e\n\u003ctd\u003e197\u003c\/td\u003e\n\u003ctd\u003e213\u003c\/td\u003e\n\u003ctd\u003e218\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.110\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.450\" H x 1.550\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.905 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eD-250-2\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116133489,"sku":"AFR1041","price":3167.17,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc_Street__59629.1449253423.500.290.png?v=1683924432"},{"product_id":"afr1050","title":"AFR 23 SBC Cylinder Head 210cc Race Ready Heads. standard exhaust. 75cc chambers","description":"\u003cp\u003eAFR1050\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.080\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7255-sbc-8mm-intake-valve-2-080-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7255\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116231793,"sku":"AFR1050","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_b1a884ca-e371-4be4-9139-088854b8df45.png?v=1684165020"},{"product_id":"afr1054","title":"AFR 23 SBC Cylinder Head 210cc Race Ready Heads. standard exhaust. 65cc chambers","description":"\u003cp\u003eAFR1054\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.080\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7255-sbc-8mm-intake-valve-2-080-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7255\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116297329,"sku":"AFR1054","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_3536e9b6-a3a9-4565-bdfe-7e0686d87b4f.png?v=1684164412"},{"product_id":"afr1055","title":"AFR 23 SBC Cylinder Head 210cc Race Ready Heads. spread port exhaust. 75cc chamb","description":"\u003cp\u003eAFR1055\u003c\/p\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.080\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7255-sbc-8mm-intake-valve-2-080-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7255\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116362865,"sku":"AFR1055","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_6a4bfedb-8af0-4f4c-8be7-a4a8ba187880.png?v=1684164377"},{"product_id":"afr1057","title":"AFR 23 SBC Cylinder Head 210cc LT4 Race Ready Reverse Cool Heads. angle plug. 65","description":"\u003cp\u003eAFR1057\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-lt4-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=477\u0026amp;attribute%5B739%5D=286\u0026amp;attribute%5B771%5D=287\" class=\"prodlink\"\u003e1057\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=477\u0026amp;attribute%5B739%5D=286\u0026amp;attribute%5B771%5D=289\" class=\"prodlink\"\u003e1101\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.080\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7255-sbc-8mm-intake-valve-2-080-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7255\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eManley 10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550\" O.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6860-sbc-lt4-gasket\" class=\"prodlink\"\u003eAFR #6860\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket, Fel-Pro #1405\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1405-210cc-245cc\" class=\"prodlink\"\u003eAFR #6835\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, LT1 Fel-Pro #1074\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1074-sbc-lt1\/\" class=\"prodlink\"\u003eAFR #6803\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eGM LT4 or Edelbrock LT4\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eNot Emissions Complient\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116428401,"sku":"AFR1057","price":3767.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__74743.1470872953.500.290_1001e961-8635-46c8-ac79-e709cc4094e3.png?v=1684163554"},{"product_id":"afr1059","title":"AFR 23 SBC Cylinder Head 210cc Race Ready Heads. spread port exhaust. 65cc chamb","description":"\u003cp\u003eAFR1059\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.080\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7255-sbc-8mm-intake-valve-2-080-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7255\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116526705,"sku":"AFR1059","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_04d97005-58fb-43ad-8235-9654e87cc355.png?v=1684164330"},{"product_id":"afr1065","title":"AFR 23 SBC Cylinder Head 220cc Race Ready Heads. standard exhaust. 65cc chambers","description":"\u003cp\u003eAFR1065\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 220cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical \"Pro Street\" style builds. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/220cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e220cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1065\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1066\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1110\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1112\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1114\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1115\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e220cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e162\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e220cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e263\u003c\/td\u003e\n\u003ctd\u003e299\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e326\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e244\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e220cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.220\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.180 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116592241,"sku":"AFR1065","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__84647.1449254100.500.290_93c933eb-a549-4b13-8694-666eb45d78f1.png?v=1684165249"},{"product_id":"afr1066","title":"AFR 23 SBC Cylinder Head 220cc Race Ready Heads. standard exhaust. 75cc chambers","description":"\u003cp\u003eAFR1066\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 220cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical \"Pro Street\" style builds. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/220cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e220cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1065\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1066\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1110\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1112\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1114\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1115\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e220cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e162\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e220cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e263\u003c\/td\u003e\n\u003ctd\u003e299\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e326\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e244\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e220cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.220\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.180 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116657777,"sku":"AFR1066","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__84647.1449254100.500.290_3a9ff735-06e2-4603-bfbc-5906ec985fb5.png?v=1684165284"},{"product_id":"afr1067","title":"AFR 23 SBC Cylinder Head 227cc Race Ready Heads. standard exhaust. 75cc chambers","description":"\u003cp\u003eAFR1067\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116723313,"sku":"AFR1067","price":3327.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_915951e4-61f9-4293-b84b-e42dfc40dab7.png?v=1684165897"},{"product_id":"afr1068","title":"AFR 23 SBC Cylinder Head 227cc Race Ready Heads. standard exhaust. 65cc chambers","description":"\u003cp\u003eAFR1068\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116854385,"sku":"AFR1068","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_367400d3-2a22-455c-b410-b44d0644883c.png?v=1684165829"},{"product_id":"afr1074","title":"AFR 23 SBC Cylinder Head 227cc Race Ready Heads. spread port exhaust. 65cc chamb","description":"\u003cp\u003eAFR1074\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116919921,"sku":"AFR1074","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_5cc98452-2683-4a0e-9f95-e21908f386f1.png?v=1684165732"},{"product_id":"afr1075","title":"AFR 23 SBC Cylinder Head 227cc Race Ready Heads. spread port exhaust. 75cc chamb","description":"\u003cp\u003eAFR1075\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133116985457,"sku":"AFR1075","price":3525.2,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_3bee5ea6-5ba9-4e65-a77d-e3d4957ad5e9.png?v=1684165787"},{"product_id":"afr1076","title":"AFR 23 SBC Cylinder Head 227cc LT4 Race Ready Reverse Cool Heads. 65cc chambers.","description":"\u003cp\u003eAFR1076\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-lt4-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC LT Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=473\u0026amp;attribute%5B744%5D=286\u0026amp;attribute%5B770%5D=287\" class=\"prodlink\"\u003e1076\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e114\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e265\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e319\u003c\/td\u003e\n\u003ctd\u003e324\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e167\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eManley 10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550\" O.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6860-sbc-lt4-gasket\" class=\"prodlink\"\u003eAFR #6860\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket, Fel-Pro #1405\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1405-210cc-245cc\" class=\"prodlink\"\u003eAFR #6835\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, LT1 Fel-Pro #1074\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1074-sbc-lt1\/\" class=\"prodlink\"\u003eAFR #6803\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eGM LT4 or Edelbrock LT4\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eNon Emissions Compliant\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117050993,"sku":"AFR1076","price":3767.77,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__15375.1470873036.500.290_859a591d-72cf-46a3-a2a9-6b6201e4cfa2.png?v=1684165686"},{"product_id":"afr1094np","title":"AFR 23 SBC Cylinder Head 195cc Competition Package Heads w\/heat riser. L98 plug.","description":"\u003cp\u003eAFR1094NP\u003c\/p\u003e\n\u003cp\u003eAFR's 195cc \"Competition\" heads are the preferred choice for a more aggressive street or street\/strip build. They feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for displacements up to 400 cubic inches, operating up to 6500-6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/195cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e195cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.185\" H x 1.265\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e64cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" H x 1.565\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.100\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.460\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.920 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117149297,"sku":"AFR1094NP","price":3775.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc_Comp__38254.1449253568.500.290.png?v=1683923526"},{"product_id":"afr1100","title":"AFR 23 SBC Cylinder Head 210cc Competition Package Heads. standard exhaust. 75cc","description":"\u003cp\u003eAFR1100\u003c\/p\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117280369,"sku":"AFR1100","price":4341.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_6b1c85bf-e135-443f-9d2e-56ec7312c734.png?v=1683925953"},{"product_id":"afr1101","title":"AFR 23 SBC Cylinder Head 210cc LT4 Competition Package Heads. standard exhaust.","description":"\u003cp\u003eAFR1101\u003c\/p\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-lt4-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=477\u0026amp;attribute%5B739%5D=286\u0026amp;attribute%5B771%5D=287\" class=\"prodlink\"\u003e1057\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=477\u0026amp;attribute%5B739%5D=286\u0026amp;attribute%5B771%5D=289\" class=\"prodlink\"\u003e1101\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eNot Emissions Complient\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117345905,"sku":"AFR1101","price":4763.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__74743.1470872953.500.290.png?v=1683926207"},{"product_id":"afr1103","title":"AFR 23 SBC Cylinder Head 210cc Competition Package Heads. standard exhaust. 65cc","description":"\u003cp\u003eAFR1103\u003c\/p\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117411441,"sku":"AFR1103","price":4341.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_0ac40021-796d-4942-a29e-537fc9257fbb.png?v=1683925852"},{"product_id":"afr1105","title":"AFR 23 SBC Cylinder Head 210 Competition Package Heads. spread port exhaust. 75c","description":"\u003cp\u003eAFR1105\u003c\/p\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117476977,"sku":"AFR1105","price":4341.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290.png?v=1683925301"},{"product_id":"afr1106","title":"AFR 23 SBC Cylinder Head 210cc Competition Package Heads. spread port exhaust. 6","description":"\u003cp\u003eAFR1106\u003c\/p\u003e\n\u003cp\u003eAFR's 210cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and aggressive street\/ strip builds up to 400 cubic inches, operating up to 6500- 6800 RPM. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/210cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e210cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1050\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\" class=\"prodlink\"\u003e1054\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1100\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\" class=\"prodlink\"\u003e1103\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1059\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=136\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1055\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=271\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1106\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=428\u0026amp;attribute%5B711%5D=272\u0026amp;attribute%5B814%5D=137\u0026amp;attribute%5B614%5D=170\" class=\"prodlink\"\u003e1105\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e199\u003c\/td\u003e\n\u003ctd\u003e248\u003c\/td\u003e\n\u003ctd\u003e285\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e309\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e158\u003c\/td\u003e\n\u003ctd\u003e192\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e222\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e210cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147\u003c\/td\u003e\n\u003ctd\u003e201\u003c\/td\u003e\n\u003ctd\u003e257\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.060\", intake 3\/4\" radius plate exhaust, 1 3\/4\" curved pipe\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e210cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eRace Ready: 2.100 sp in, Comp 2.115 sq. in\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eThis product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117542513,"sku":"AFR1106","price":4341.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__29088.1449254037.500.290_aa3030ad-1e00-4d1a-b8d4-85b3f36d9661.png?v=1683925760"},{"product_id":"afr1110","title":"AFR 23 SBC Cylinder Head 220cc Competition Package Heads. standard exhaust. 65cc","description":"\u003cp\u003eAFR1110\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 220cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical \"Pro Street\" style builds. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/220cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e220cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1065\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1066\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1110\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1112\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1114\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1115\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e220cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e162\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e220cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e263\u003c\/td\u003e\n\u003ctd\u003e299\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e326\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e244\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e220cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.220\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.180 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117739121,"sku":"AFR1110","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__84647.1449254100.500.290_0986b03b-66e7-47db-a029-9bf261615b26.png?v=1684165165"},{"product_id":"afr1112","title":"AFR 23 SBC Cylinder Head 220cc Competition Package Heads. standard exhaust. 75cc","description":"\u003cp\u003eAFR1112\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 220cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical \"Pro Street\" style builds. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/220cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e220cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1065\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1066\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1110\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1112\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1114\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1115\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e220cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e162\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e220cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e263\u003c\/td\u003e\n\u003ctd\u003e299\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e326\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e244\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e220cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.220\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.180 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117804657,"sku":"AFR1112","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__84647.1449254100.500.290_ae20b9ba-13cb-46ae-a636-0cde4e3b2264.png?v=1684165197"},{"product_id":"afr1114","title":"AFR 23 SBC Cylinder Head 220cc Competition Package Heads. spread port exhaust. 6","description":"\u003cp\u003eAFR1114\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 220cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical \"Pro Street\" style builds. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/220cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e220cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1065\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1066\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1110\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1112\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1114\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1115\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e220cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e162\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e220cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e263\u003c\/td\u003e\n\u003ctd\u003e299\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e326\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e244\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e220cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.220\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.180 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117870193,"sku":"AFR1114","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__84647.1449254100.500.290.png?v=1684165060"},{"product_id":"afr1115","title":"AFR 23 SBC Cylinder Head 220cc Competition Package Heads. spread port exhaust. 7","description":"\u003cp\u003eAFR1115\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 220cc \"Race Ready™\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This is AFR's largest, best flowing head for use with conventional rocker arms. Recommended for race applications or radical \"Pro Street\" style builds. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/220cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e220cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1065\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=136\" class=\"prodlink\"\u003e1066\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1110\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\" class=\"prodlink\"\u003e1112\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=271\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1114\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=429\u0026amp;attribute%5B793%5D=272\u0026amp;attribute%5B810%5D=261\u0026amp;attribute%5B795%5D=170\" class=\"prodlink\"\u003e1115\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"8\"\u003e220cc Race Ready™ Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e162\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e220cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e145\u003c\/td\u003e\n\u003ctd\u003e207\u003c\/td\u003e\n\u003ctd\u003e263\u003c\/td\u003e\n\u003ctd\u003e299\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e326\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e240\u003c\/td\u003e\n\u003ctd\u003e244\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x .375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8 mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAFR Stud Girdle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6200-eliminator-stud-girdle-180cc-220cc\" class=\"prodlink\"\u003eAFR #6200\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e220cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.220\" H x 1.310\" W x 3\/8 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.420\" H x 1.545\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.750\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.180 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133117935729,"sku":"AFR1115","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/210cc_Comp__84647.1449254100.500.290_52c0248f-bee7-4e97-8846-d137b5344e53.png?v=1684165104"},{"product_id":"afr1120","title":"AFR 23 SBC Cylinder Head 227cc Competition Package Heads. standard exhaust. 75cc","description":"\u003cp\u003eAFR1120\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118001265,"sku":"AFR1120","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_4af3da9a-971f-479d-ae0e-a3a943150722.png?v=1684165598"},{"product_id":"afr1121","title":"AFR 23 SBC Cylinder Head 227cc Competition Package Heads. standard exhaust. 65cc","description":"\u003cp\u003eAFR1121\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118066801,"sku":"AFR1121","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_becc870f-65a5-4962-8719-3a586109f7d9.png?v=1684165526"},{"product_id":"afr1124","title":"AFR 23 SBC Cylinder Head 227cc Competition Package Heads. spread port exhaust. 6","description":"\u003cp\u003eAFR1124\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118132337,"sku":"AFR1124","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290.png?v=1684165383"},{"product_id":"afr1125","title":"AFR 23 SBC Cylinder Head 227cc Competition Package Heads. spread port exhaust. 7","description":"\u003cp\u003eAFR1125\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready™\" and “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1067\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\" class=\"prodlink\"\u003e1068\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eRace Ready™\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1120\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\" class=\"prodlink\"\u003e1121\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1074\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=136\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1075\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=271\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1124\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=430\u0026amp;attribute%5B715%5D=272\u0026amp;attribute%5B811%5D=261\u0026amp;attribute%5B288%5D=170\" class=\"prodlink\"\u003e1125\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e75cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready™ Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e116\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e260\u003c\/td\u003e\n\u003ctd\u003e292\u003c\/td\u003e\n\u003ctd\u003e310\u003c\/td\u003e\n\u003ctd\u003e316\u003c\/td\u003e\n\u003ctd\u003e322\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e160\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, - 260* max recommended duration, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1003\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1003-sbc-350-180cc-227cc\" class=\"prodlink\"\u003eAFR #6800\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118263409,"sku":"AFR1125","price":4459.47,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__19509.1449254059.500.290_98a99006-35e0-4929-8370-87c26f10ea51.png?v=1684165437"},{"product_id":"afr1126","title":"AFR 23 SBC Cylinder Head 227cc Competition Package LT4 Reverse Cool Heads. 65cc","description":"\u003cp\u003eAFR1126\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR's 227cc \"Race Ready\" and \"Competition\" heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/227cc-sbc-lt4-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e227cc Aluminum SBC LT Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=473\u0026amp;attribute%5B744%5D=286\u0026amp;attribute%5B770%5D=287\" class=\"prodlink\"\u003e1076\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eGM LT4\u003c\/td\u003e\n\u003ctd\u003eRace Ready\u003c\/td\u003e\n\u003ctd\u003e65cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"9\"\u003e227cc Race Ready Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e148\u003c\/td\u003e\n\u003ctd\u003e210\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003ctd\u003e304\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e315\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e114\u003c\/td\u003e\n\u003ctd\u003e155\u003c\/td\u003e\n\u003ctd\u003e204\u003c\/td\u003e\n\u003ctd\u003e220\u003c\/td\u003e\n\u003ctd\u003e225\u003c\/td\u003e\n\u003ctd\u003e229\u003c\/td\u003e\n\u003ctd\u003e233\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e227cc Competition Head Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e152\u003c\/td\u003e\n\u003ctd\u003e212\u003c\/td\u003e\n\u003ctd\u003e265\u003c\/td\u003e\n\u003ctd\u003e300\u003c\/td\u003e\n\u003ctd\u003e312\u003c\/td\u003e\n\u003ctd\u003e319\u003c\/td\u003e\n\u003ctd\u003e324\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e167\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e230\u003c\/td\u003e\n\u003ctd\u003e234\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e241\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.100\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7256-sbc-sbf-8mm-intake-valve-2-100-x-5-080-oal\" class=\"prodlink\"\u003eAFR #7256\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Spring 1.550\" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710\" maximum lift, Max RPM 7200-7400\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8000-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8000\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eManley 10° Steel Retainers 1.500\" O.D x 1.120\" I.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8511-10-steel-retainer-1-500-od-x-1-120-id-x-705-id\" class=\"prodlink\"\u003eAFR #8511\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550\" O.D x .705\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6860-sbc-lt4-gasket\" class=\"prodlink\"\u003eAFR #6860\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket, Fel-Pro #1405\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1405-210cc-245cc\" class=\"prodlink\"\u003eAFR #6835\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, LT1 Fel-Pro #1074\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1074-sbc-lt1\/\" class=\"prodlink\"\u003eAFR #6803\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eGM LT4 or Edelbrock LT4\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e227cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e65cc or 75cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 55cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eNote: Angle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.340 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCarb EO#\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eNon Emissions Compliant\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118328945,"sku":"AFR1126","price":4586.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/195cc-LT__15375.1470873036.500.290.png?v=1684165649"},{"product_id":"afr1130-ti","title":"AFR 23 SBC Cylinder Head 235cc Competition Package Heads. standard exhaust. 80cc","description":"\u003cp\u003eAFR1130-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 235cc “Competition” heads feature 100% CNC ported intake, exhaust   chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/235cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e235cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\" class=\"prodlink\"\u003e1132-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\" class=\"prodlink\"\u003e1130-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1134-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1136-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e235cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e159\u003c\/td\u003e\n\u003ctd\u003e221\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e336\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"3\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.00\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Springs 1.550\" OD Solid Roller Dual Drag Race Spring, 250 lbs on seat, .800\" maximum lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e235cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.470 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118394481,"sku":"AFR1130-TI","price":5196.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__24628.1449254087.500.290_06331ea5-b248-40b3-b5cb-101f1aff4916.png?v=1684166169"},{"product_id":"afr1132-ti","title":"AFR 23 SBC Cylinder Head 235cc Competition Package Heads. standard exhaust. 70cc","description":"\u003cp\u003eAFR1132-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 235cc “Competition” heads feature 100% CNC ported intake, exhaust   chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/235cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e235cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\" class=\"prodlink\"\u003e1132-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\" class=\"prodlink\"\u003e1130-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1134-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1136-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e235cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e159\u003c\/td\u003e\n\u003ctd\u003e221\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e336\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"3\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.00\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Springs 1.550\" OD Solid Roller Dual Drag Race Spring, 250 lbs on seat, .800\" maximum lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e235cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.470 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118460017,"sku":"AFR1132-TI","price":5196.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__24628.1449254087.500.290_c161bb88-2c20-4a2b-a315-f06020041c48.png?v=1684166132"},{"product_id":"afr1134-ti","title":"AFR 23 SBC Cylinder Head 235cc Competition Package Heads. spread port exhaust. 7","description":"\u003cp\u003eAFR1134-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 235cc “Competition” heads feature 100% CNC ported intake, exhaust   chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/235cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e235cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\" class=\"prodlink\"\u003e1132-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\" class=\"prodlink\"\u003e1130-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1134-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1136-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e235cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e159\u003c\/td\u003e\n\u003ctd\u003e221\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e336\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"3\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.00\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Springs 1.550\" OD Solid Roller Dual Drag Race Spring, 250 lbs on seat, .800\" maximum lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e235cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.470 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118558321,"sku":"AFR1134-TI","price":5196.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__24628.1449254087.500.290_439f1382-83d7-4962-96f9-a0e380c46bea.png?v=1684166076"},{"product_id":"afr1136-ti","title":"AFR 23 SBC Cylinder Head 235cc Competition Package heads. spread port exhaust. 8","description":"\u003cp\u003eAFR1136-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 235cc “Competition” heads feature 100% CNC ported intake, exhaust   chambers, A356 aluminum castings and high quality components throughout. This head features 60\/40 valve spacing and requires shaft mount rocker arms for optimum valve train geometry (can be used with .050 offset intake rockers for drag race only applications). AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/235cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e235cc Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\" class=\"prodlink\"\u003e1132-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\" class=\"prodlink\"\u003e1130-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=273\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1134-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=431\u0026amp;attribute%5B720%5D=274\u0026amp;attribute%5B289%5D=170\" class=\"prodlink\"\u003e1136-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e235cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e159\u003c\/td\u003e\n\u003ctd\u003e221\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e295\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e318\u003c\/td\u003e\n\u003ctd\u003e327\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e336\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e120\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"3\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.00\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" long O.A.L.\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC Racing Springs 1.550\" OD Solid Roller Dual Drag Race Spring, 250 lbs on seat, .800\" maximum lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eARP 7\/16\" Rocker Studs\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6405-arp-7-16-rocker-studs-for-sbc-sbf-lsx\" class=\"prodlink\"\u003eAFR #6405\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAdjustable 5\/16\" Guide Plates\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6103-sbc-sbf-adjustable-guide-plate\" class=\"prodlink\"\u003eAFR #6103\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-6\" class=\"prodlink\"\u003eAFR #6036\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 Stud Mount Rocker Arms, Hardland Sharp .050 offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/hs-roller-rockers-sbc-050-offset-7-16-x-1-5\" class=\"prodlink\"\u003eAFR #6035\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eStud Girdle AFR Offset\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6208-eliminator-stud-girdle-for-sbc-227-235cc\" class=\"prodlink\"\u003eAFR #6208\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e235cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.290\" W 5\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.430\" H x 1.540\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.470 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118623857,"sku":"AFR1136-TI","price":5196.72,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/227cc_Comp__24628.1449254087.500.290.png?v=1684166034"},{"product_id":"afr1137-ti","title":"AFR 23 SBC Cylinder Head 245cc Competition Package Heads. standard exhaust. 70cc","description":"\u003cp\u003eAFR1137-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 245cc “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. NPP stands for “no pushrod pinch”, and this is AFR’s largest 60\/40 valve spacing head. These heads require shaft mount rocker arms for all applications and has extra machining for 3\/8” pushrod clearance. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/245cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e245cc NPP Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\" class=\"prodlink\"\u003e1137-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\" class=\"prodlink\"\u003e1138-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1139-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1140-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e245cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e161\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e320\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e337\u003c\/td\u003e\n\u003ctd\u003e345\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e128\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC #1225 Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 250 lbs. on seat, .800” max lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .550\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6064\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e245cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.300\" W 7\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.465\" H x 1.570\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.730 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118689393,"sku":"AFR1137-TI","price":5486.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/245cc_Comp_NPP__78030.1449254132.500.290_ee6b4529-a2bc-4ca9-ad68-6f3f3feb7309.png?v=1684166332"},{"product_id":"afr1138-ti","title":"AFR 23 SBC Cylinder Head 245cc Competition Package Heads. standard exhaust. 80cc","description":"\u003cp\u003eAFR1138-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 245cc “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. NPP stands for “no pushrod pinch”, and this is AFR’s largest 60\/40 valve spacing head. These heads require shaft mount rocker arms for all applications and has extra machining for 3\/8” pushrod clearance. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/245cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e245cc NPP Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\" class=\"prodlink\"\u003e1137-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\" class=\"prodlink\"\u003e1138-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1139-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1140-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e245cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e161\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e320\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e337\u003c\/td\u003e\n\u003ctd\u003e345\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e128\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC #1225 Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 250 lbs. on seat, .800” max lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .550\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6064\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e245cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.300\" W 7\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.465\" H x 1.570\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.730 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118754929,"sku":"AFR1138-TI","price":5486.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/245cc_Comp_NPP__78030.1449254132.500.290_90a186e2-bd30-4c8e-986d-277424cd22c8.png?v=1684166368"},{"product_id":"afr1139-ti","title":"AFR 23 SBC Cylinder Head 245cc Competition Package Head. spread port exhaust. 70","description":"\u003cp\u003eAFR1139-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 245cc “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. NPP stands for “no pushrod pinch”, and this is AFR’s largest 60\/40 valve spacing head. These heads require shaft mount rocker arms for all applications and has extra machining for 3\/8” pushrod clearance. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/245cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e245cc NPP Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\" class=\"prodlink\"\u003e1137-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\" class=\"prodlink\"\u003e1138-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1139-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1140-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e245cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e161\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e320\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e337\u003c\/td\u003e\n\u003ctd\u003e345\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e128\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC #1225 Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 250 lbs. on seat, .800” max lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .550\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6064\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e245cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.300\" W 7\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.465\" H x 1.570\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.730 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 class=\"descrip\" data-mce-fragment=\"1\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\" data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBar Codes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePushrods -\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMills\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eStud Girdles\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Guide Clearance\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Springs\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003ePiston to Valve\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCNC Porting\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eSpring Installation\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eRocker Arms\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/section\u003e","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118820465,"sku":"AFR1139-TI","price":5486.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/245cc_Comp_NPP__78030.1449254132.500.290.png?v=1684166244"},{"product_id":"afr1140-ti","title":"AFR 23 SBC Cylinder Head 245cc Competition Package Head. spread port exhaust. 80","description":"\u003cp\u003eAFR1140-TI\u003c\/p\u003e\n\u003cdiv id=\"prod_info\"\u003e\n\u003csection class=\"section_style\"\u003e\n\u003cp\u003eAFR’s 245cc “Competition” heads feature 100% CNC ported intake, exhaust \u0026amp; chambers, A356 aluminum castings and high quality components throughout. NPP stands for “no pushrod pinch”, and this is AFR’s largest 60\/40 valve spacing head. These heads require shaft mount rocker arms for all applications and has extra machining for 3\/8” pushrod clearance. AFR heads are available bare (without parts), call our tech line for details.\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/245cc-sbc-race-cylinder-head\/#faq\" class=\"prodlink\"\u003ePlease see footnotes for additional information.\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth colspan=\"4\"\u003e245cc NPP Aluminum SBC Cylinder Heads\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart #\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eExhaust Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003ePorting Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCombustion Chamber\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\" class=\"prodlink\"\u003e1137-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\" class=\"prodlink\"\u003e1138-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eStock\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=273\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1139-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e70cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/cart.php?action=add\u0026amp;product_id=432\u0026amp;attribute%5B721%5D=274\u0026amp;attribute%5B290%5D=170\" class=\"prodlink\"\u003e1140-TI\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eSpread Port\u003c\/td\u003e\n\u003ctd\u003eCompetition\u003c\/td\u003e\n\u003ctd\u003e80cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003e\u003cspan\u003e\u003cstrong\u003eClick part # to add product to your cart\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable border=\"0\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"10\"\u003e245cc Competition Flow Chart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e.200\u003c\/td\u003e\n\u003ctd\u003e.300\u003c\/td\u003e\n\u003ctd\u003e.400\u003c\/td\u003e\n\u003ctd\u003e.500\u003c\/td\u003e\n\u003ctd\u003e.550\u003c\/td\u003e\n\u003ctd\u003e.600\u003c\/td\u003e\n\u003ctd\u003e.650\u003c\/td\u003e\n\u003ctd\u003e.700\u003c\/td\u003e\n\u003ctd\u003e.800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInt\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e161\u003c\/td\u003e\n\u003ctd\u003e224\u003c\/td\u003e\n\u003ctd\u003e261\u003c\/td\u003e\n\u003ctd\u003e301\u003c\/td\u003e\n\u003ctd\u003e311\u003c\/td\u003e\n\u003ctd\u003e320\u003c\/td\u003e\n\u003ctd\u003e331\u003c\/td\u003e\n\u003ctd\u003e337\u003c\/td\u003e\n\u003ctd\u003e345\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExh\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e128\u003c\/td\u003e\n\u003ctd\u003e165\u003c\/td\u003e\n\u003ctd\u003e214\u003c\/td\u003e\n\u003ctd\u003e228\u003c\/td\u003e\n\u003ctd\u003e237\u003c\/td\u003e\n\u003ctd\u003e238\u003c\/td\u003e\n\u003ctd\u003e243\u003c\/td\u003e\n\u003ctd\u003e245\u003c\/td\u003e\n\u003ctd\u003e250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp align=\"center\"\u003eTest conducted at 28\" of water (pressure) on Superflow 600\u003cbr\u003eBore Size: 4.155\", intake 3\/4\" radius plate exhaust, 1 7\/8\" curved pipe\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003csection id=\"included\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Combustion Chambers\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Exhaust Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003e100% CNC Ported Intake Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\u003cstrong\u003eCompetition 5-angle Valve Job\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Intake Valve, 2.125\" x 5.000\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7253-sbc-8mm-intake-valve-2-125-x-5-000-oal\" class=\"prodlink\"\u003eAFR #7253\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bead Lock Exhaust Valve, 1.600\" x 5.030\" Overall Valve Length\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-7254-sbc-sbf-8mm-exhaust-valve-1-600-x-5-030-oal\" class=\"prodlink\"\u003eAFR #7254\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003ePAC #1225 Racing Springs 1.550” OD Solid Roller Dual Valve Drag Race Spring, 250 lbs. on seat, .800” max lift, Max RPM 8000-8200\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8001-1-550-od-solid-roller\" class=\"prodlink\"\u003eAFR #8001\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Titanium Retainers 1.500” O.D x 1.120” I.D x .705” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8505-10-titanium-retainer-1-500-od-x-1-120-id-x-750-id\/\" class=\"prodlink\"\u003eAFR #8505\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e10° Bead Lock Valve Keepers with lashcap recess\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9009-10-valve-locks-8mm\" class=\"prodlink\"\u003eAFR #9009\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eViton Valve Seals .600\" O.D x .495\" I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6612-sbc-sbf-ls1-valve-seal\" class=\"prodlink\"\u003eAFR #6612\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHardened Valve Spring I.D Locator 1.550” O.D x .780” I.D\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-8048-id-spring-seat-1-550-od-x-780-od-x-570-id\" class=\"prodlink\"\u003eAFR #8048\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Intake Valve Seats 2.200\" O.D x 1.750\" I.D x.375\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9060-sbc-lsx-intake-seat-2-200-od\" class=\"prodlink\"\u003eAFR #9060\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDuctile Iron Exhaust Valve Seats 1.696\" O.D x 1.325\" I.D x .305\" Deep\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9070-sbc-exhaust-seat-1-675-od\" class=\"prodlink\"\u003eAFR #9070\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e8mm Bronze Valve Guides .502\" O.D x 2.100\" O.A.L\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-9051-lsx-sbf-sbc-bronze-guide\" class=\"prodlink\"\u003eAFR #9051\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"recommended\" class=\"section_style\"\u003e\u003cstrong\u003eImportant\u003c\/strong\u003e: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eRecommended Components:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.5 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-5-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6062\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .450\" off-set (requires .180 offset lifters)\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-227-235-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6063\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003e1.6 T\u0026amp;D Shaft Mount w\/ .550\" off-set\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/1-6-t-d-shaft-mount-for-245cc-eliminator\" class=\"prodlink\"\u003eAFR #6064\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6901-sbc-intake-gasket\/\" class=\"prodlink\"\u003eAFR #6901\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Gasket\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6905-sbc-exhaust-gasket\/\" class=\"prodlink\"\u003eAFR #6905\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 350cid Fel-Pro #1004\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1004-sbc-350-235cc-245cc\" class=\"prodlink\"\u003eAFR #6801\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Gasket, 400cid Fel-Pro #1014\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/fel-pro-1014-sbc-400\" class=\"prodlink\"\u003eAFR #6802\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Bolt Kit, ARP #134-3701\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-134-3701-sbc-head-bolt-kit\" class=\"prodlink\"\u003eAFR #6310\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/arp-234-4301-12-point-nuts\" class=\"prodlink\"\u003eAFR #6305\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eHead Bolt Washers, Manley\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/afr-6320-head-bolt-washer-kit\" class=\"prodlink\"\u003eAFR #6320\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-race-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4811\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSuggested Manifold\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e\u003ca href=\"https:\/\/www.airflowresearch.com\/sbc-eliminator-cnc-port-match-street-strip-single-plane-aluminum-4150-intake-manifold\/\" class=\"prodlink\"\u003eAFR #4810\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Starting Range\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eAutolite 3922\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection id=\"specs\" class=\"section_style\"\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"descrip\" colspan=\"2\"\u003e\u003cstrong\u003eSpecifications \u0026amp; Features:\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eA356 Aluminum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e245cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.200\" H x 1.300\" W 7\/16 Radius\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eIntake Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003eStock\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Volume\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Dimension\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.465\" H x 1.570\" W\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eExhaust Port Location\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.250\" Raised\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eCombustion Chamber Size\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e70cc or 80cc\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Cover Bolt Pattern\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003ePerimeter Bolt\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Angle\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e23°\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eValve Spring Pocket Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.580\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMax Valve Spring Pocket Machining\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e1.680\" O.D\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDo not machine spring pad any deeper.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eDeck Thickness\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.750\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Bore Diameter\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e4.000\"\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eFlat Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.006\" per cc 65cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eAngle Mill\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e.009\" per cc 60cc Maximum\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAngle mills might require .120\" Thick intake gasket.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eMinimum Cross Sectional Area\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e2.730 sq. in.\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd\u003eSpark Plug Dimensions\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv align=\"right\"\u003e14mm x .750\" w\/Gasket Seat\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"pib\"\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cstrong\u003eCARB Status:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eTHESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003ch2 class=\"descrip\"\u003eFootnotes\u003c\/h2\u003e\n\u003col class=\"a\"\u003e\n\u003cli\u003e\n\u003ch3\u003eAFR Small Block Chevy\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\u003cul\u003e\n\u003cli\u003eWe strongly recommend using 7\/16\" rocker studs with todays fast cam rates and RPM capabilities as 3\/8\" Rocker Studs can occasionally break.\u003c\/li\u003e\n\u003cli\u003eHeads with 1.625\" O.D springs will require some springs to be removed for access to some head bolts when installing the heads.\u003c\/li\u003e\n\u003cli\u003eHeads are designed for 5\/16\" pushrods, Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR 227\/235cc Heads:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDue to the \"60\/40\" stud and valve locations, shaft mount rockers are highly recommended, however if you're ONLY Drag Racing you can run a .050\" offset intake stud mount rocker with the AFR supplied guide plate (exhaust will use a standard rocker). Please note that with the .050\" offset rocker arms the roller tip of the stud mount rocker will not be perfectly centered and will not sit squarely on the valve causing increased side loading and wear. This option is not recommended for race\/endurance applications and\/or street engines that see a lot of miles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR LT-1 \/ LT-4 \/ Vortec Heads\/ Late Model TBI\/TPI Heads\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Your factory accessory bolts and center bolt valve covers need to be shortened 3\/16\" or they will bottom out. These cylinder heads are machined for both center and perimeter bolt valve covers, please see your instructions to avoids oil leaks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003e\n\u003ch3\u003eGeneral Recommendations for AFR Cylinder Heads:\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBar Codes\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Please keep the bar code \u0026amp; paperwork shipped with your head, these contain all the specs for your heads when calling AFR.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Volume\/Pressure Oil Pumps\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- If you are using a high volume or high pressure oil pump it can submerge the valve seals in oil causing smoking or oil consumption. Your block manufacturer or engine builder can recommend oil restrictions to the top end\/valve train components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePushrods -\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eDifferent length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120\" thick-wall pushrods.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMills\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Flat or angle mills could affect flow numbers and might require a thicker intake gasket.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStud Girdles\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Due to many available factory OEM and aftermarket style\/variations your existing stud girdle may not fit (AFR heads require AFR Stud Girdles)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoosted\/Nitrous Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend considering Inconel exhaust valves and AFR's optional heavy duty intake valve for power adder applications. Since boosted or nitrous oxide applications accelerate RPM quickly, additional spring pressure is required. We strongly recommend upgrading your valve springs or increasing your valve spring pressures since boost pressure on the valve reduces spring tension. For example, 15lbs boost on a 2.125 OD valve reduces the springs closed seat pressure by approximately 40-45lbs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll MARINE Applications\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- We strongly recommend Inconel exhaust valves \u0026amp; also offer a hard anodized coating to slow the effects of corrosion. Please see note on guide clearance below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Guide Clearance\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Your AFR Heads come with proper guide clearance (.0012\"-.0016\") for most applications. Boosted\/Nitrous or marine applications might require additional clearance and it is the customer's responsibility to verify proper clearance in these applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Springs\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Forced induction, nitrous oxide and cams with aggressive ramp rates may require additional spring pressure. We offer optional valve springs for these types of applications. AFR also recommends the use of billet cam cores and short travel Hydraulic Roller lifters which tolerate higher spring loads. Please don't hesitate to contact us directly if you question which spring is correct for your application.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAFR Titanium Valves\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Might require lash caps and different length pushrods. Titanium valves are coated, do not grind valves because it removes the protective coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston to Valve\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). We recommend a minimum depth of .080\" on the intake valve and .100\" on the exhaust with a radial clearance of .020\" minimum around the perimeter of each valve. Clay is recommended to visually verify both depth as well as radial clearance. Just checking depth is not enough, the position of the valve pocket must also be addressed.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eIt is the customers responsibility to verify proper piston to valve clearance.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Porting\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Occasionally a 100% CNC ported head might have a very small area left \"as cast\", this in no way affects performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Mount Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Shaft mount rockers might require additional clearance for proper pushrod fitment. Do not clearance the push rod area as the wall is .060\" thick. If you use Jesel Shaft Mounts, AFR only recommends their Pro Series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComp Cams Pro Magnum Rockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- Typically these rocker arms do not clear a 1.500\" O.D retainer. A lash cap is required to space up the rocker arm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Installation\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- To ease installation with 1.550\" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Spring Installed Heights\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e- AFR valve spring installed height spec is +\/- .015 which is the smallest shim available for adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRocker Arms\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e- Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Air Flow Research","offers":[{"title":"Default Title","offer_id":40133118918769,"sku":"AFR1140-TI","price":5486.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/files\/245cc_Comp_NPP__78030.1449254132.500.290_e4f03b17-2a0a-4e31-8a9f-317ad169988c.png?v=1684166272"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1088\/6742\/collections\/white_letters_only_bg_1436572397__66326.webp?v=1675463601","url":"https:\/\/www.parkautomotorsports.ca\/collections\/air-flow-research.oembed?page=11","provider":"Park Auto Motorsports","version":"1.0","type":"link"}