40-511
1970-1990 454 Big Block Chevrolet, 168 Tooth, External Balanced
OVERVIEW
Hays SFI Approved heavy-duty flexplates for BBC are constructed of a thicker than stock steel plate, enabling them to withstand the stress of high-stall torque converters and high-RPM engines. While factory stock plates tend to crack around the crankshaft hub when punished under high torque and RPM conditions, the 4mm thick center plate utilized on a Hays flexplate handles the brute force. These flexplates are supplied with a precision double welded ring gear and feature multiple engine and transmission bolt patterns. All Hays flexplates are zinc-dichromate plated to resist corrosion and are SFI certified under specification 29.1.
Features:
- SFI-approved – legal for use in racing classes that require SFI certification
- Flexplate features a precision double welded ring gear
- Has 4mm thick center plate to resist cracking near crankshaft flange
- Zinc-dichromate plated to resist corrosion
- CAD designed to provide optimum performance and reliability
- Available in Internal or External balanced versions
- Applications offered for a wide variety of engine and transmission bolt patterns
About Hays
Looking for clutches, flywheels, flexplates, or torque converters? Shop the selection at Holley.com to find what you need.
SPECS
| # of Teeth | 168 |
|---|---|
| Application | Chevrolet |
| Brand | Hays |
| Centerplate Thickness | 4 mm |
| Clearance Category | Transmission and Drivetrain |
| Converter Bolt Pattern | 3 x 9.75", 3 x 10.75", 3 x 11.50" |
| Crankshaft Bolt Hole Count | 6 |
| Discount Percentage | Over 75% |
| Emission Code | 5 |
| Engine | Chevrolet Big Block Mark IV |
| Engine Balance | External |
| Engine Size | 454 Cubic Inch / 7.4L |
| Finish | Silver |
| Material | Steel |
| Product Type | Flexplates |
| Rear Main Seal Style | Two Piece |
| Sale Category | Transmission and Drivetrain |
| SFI Approved | Yes |
| SFI Certification | 29.1 |
| Style | Quick Launch |
| Thickness | 4 mm |
| Warranty | 90 Day |
| UPC | 090127062418 |
| Part Number | 40-511 |
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$19.99 CAD | $24.99 CAD
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$19.99 CAD | $24.99 CAD
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$19.99 CAD | $24.99 CAD
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