818112
This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2022 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with the 6.6L gas engine, is perfect if you are looking for an aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. Maximum increases of up to 9 hp and 9 lb.ft. over the stock exhaust at the rear wheels. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel Outlaw series muffler and large dual 3.00-inch 409 stainless steel mandrel-bent tailpipes that can be configured to exit either dual straight out the back, or dual out the sides behind the rear wheels which is best suited for towing applications. The system is finished off with polished 4.00-inch stainless steel tips and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
Features:
- Max increases of up to 9 hp and 9 lb.ft. over the stock exhaust at the rear wheels
- 3.50-inch and 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
- Dual 4.00-inch polished stainless steel tips add a custom look
- Includes complete hardware and factory styled hangers in the stock locations for an easy installation
- Super 10 Series performance muffler delivers a deep, aggressive performance tone and improves exhaust flow
- Backed by Flowmaster’s Lifetime Limited Warranty
- Can be configured to exit straight out the rear or out the side depending on preference
About Flowmaster

Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.
SPECS
Brand | Flowmaster |
---|---|
Emission Code | 5 |
Exhaust Series | Outlaw |
Exit Position | DOR/S |
Inlet Tubing Diameter | 3.50 |
Mount Type | Uses Factory Hangers |
Muffler Body Length (in) | 6.5 |
Muffler Color | Black |
Muffler Finish | Painted |
Muffler Inlet Diameter (in) | 3.50 |
Muffler Inlet Location | Centered |
Muffler Material | 409S Stainless Steel |
Muffler Outlet Diameter (in) | 3.00 |
Muffler Outlet Location | Dual Outlet |
Muffler Overall Length (in) | 12.375 |
Muffler Part Number | Kit Only |
Muffler Quantity | 1 |
Muffler Series | 10 Series |
Muffler Shape | Oval |
Muffler Type | Reflection |
Outlet Tubing Diameter | 3.00 |
Product Type | Exhaust System |
Single Dual | Dual |
Sound Level | Aggressive |
System Type | Cat-back |
Tip Cut | Angle |
Tip Diameter | 4.00 |
Tip Edge Style | Cut |
Tip Finish | Polished |
Tip Length | 13 |
Tip Logo | Embossed |
Tip Material | 304 Stainless |
Tip Quantity | 2.00 |
Tip Shape | Round |
Tip Style | Double Wall |
Tubing Diameter (in) | 3.5/3 |
Tubing Material | 409S Stainless Steel |
UPC | 090127130162 |
California Proposition 65 Chemical Name | Chromium (hexavalent compounds) |
Nickel (Metallic) | |
California Proposition 65 Required | Yes |
Part Number | 818112 |
Product title
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$19.99 CAD | $24.99 CAD
Product title
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$19.99 CAD | $24.99 CAD
Product title
Vendor
$19.99 CAD | $24.99 CAD
Product title
Vendor