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Flowmaster

Flowmaster Outlaw Cat-Back Exhaust System

Fits 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Gas V8, Outlaw Series, 3.50" to Dual 3.00" Cat-Back, Dual Rear Exit, Stainless Steel Exhaust System

Part # 818112 Be the first to write a review

Flowmaster Outlaw Cat-Back Exhaust System

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MSRP $966.95
$772.95
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Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2025 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
Brand Flowmaster
Catalytic Converter Quantity0
CategoryExhaust
Clamps IncludedYes
Emission Code5
Exhaust SeriesOutlaw
Exhaust System Kit TypeCat-Back
Exhaust Tip IntercooledNo
Exhaust Tip Quantity2
Exit PositionDOR/S
Exit StyleDual Out Rear
Dual Out Side
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Inlet Tubing Diameter3.50 IN
Main Piping Diameter3.00 IN
Material409 Stainless Steel
Mount TypeUses factory hangers
Muffler Body Length6.50 IN
Muffler ColorBlack
Muffler FinishBlack High-Temperature Paint Finish
Muffler Inlet Diameter3.50 IN
Muffler Inlet LocationCenter
Muffler Material409 Stainless Steel
Muffler Outlet Diameter3.00 IN
Muffler Outlet LocationDual
Muffler Overall Length12.375 IN
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series10 Series
Muffler ShapeOval
Muffler TypeReflection
Outlet Tubing Diameter3.00 IN
part typeExhaust System Kit
Pipe Material409 Stainless Steel
Product TypeExhaust System
Single DualDual
Sound LevelAggressive
Sub CategoryExhaust and Tail Pipes
System TypeCat-back
Tail Pipe Tapered OutletNo
Tip CutAngle
Tip Diameter4.00 IN
Tip Edge StyleCut
Tip FinishPolished
Tip Length13.00 IN
Tip LogoEmbossed
Tip Material304 Stainless Steel
Tip Quantity2.00
Tip ShapeRound
Tip StyleDouble Wall
Tubing Diameter3.00 IN
Tubing Material409 Stainless Steel
TypeCat-Back
Valve IncludedNo
Valve TypeNot Included
UPC090127130162
California Proposition 65 Chemical NameChromium (hexavalent compounds), Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number818112
5

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.
Instructions - 818112_Instructions.pdf
Instructions - fm_warranty_general.pdf
Fits Crew Cab with 6.5-foot bed length, 159-inch wheelbase only. Will not fit models with 5th wheel tow hitch installed.

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