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Flowmaster Outlaw Cat-Back Exhaust System for Chevrolet and GMC

Part # 818112

  • 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

Description

This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2026 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.

Specifications

CARB (California) CompliantYes
Catalytic Converter IncludedNo
Catalytic Converter Quantity0
Clamping TypeFlat Band
Clamps IncludedYes
Exhaust SeriesOutlaw
Exhaust Tip ColorSilver
Exhaust Tip ConnectionClamp-On
Exhaust Tip CutAngled
Exhaust Tip Diameter4.00 in
Exhaust Tip EdgeAngle Cut
Exhaust Tip FinishPolished
Exhaust Tip IntercooledNo
Exhaust Tip Length13.00 in
Exhaust Tip Material304 Stainless Steel
Exhaust Tip Quantity2
Exhaust Tip ResonatedNo
Exhaust Tip ShapeRound
Exhaust Tip WallDouble Wall
Exit StyleDual Out Side
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Inlet Diameter3.50 in
Inlet TypeFlanged
Main Piping Diameter3.00 in
UPC / GTIN00090127130162
WarrantyManufacturer's Limited Lifetime Warranty

Fits these vehicles

YearMakeModelSubmodelEngineNote
2020 - 2022ChevroletSilverado 2500 HDCustom, High Country, LT, LTZ, WT6.6L V8Polished Tip Finish
2023ChevroletSilverado 2500 HDCustom, High Country, LT, LTZ, WT6.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
2024 - 2026ChevroletSilverado 2500 HDCustom, High Country, LT, LTZ, WT, ZR26.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
2020 - 2022ChevroletSilverado 3500 HDBase, High Country, LT, LTZ, WT6.6L V8Polished Tip Finish
2023ChevroletSilverado 3500 HDBase, High Country, LT, LTZ, WT6.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
2024 - 2026ChevroletSilverado 3500 HDHigh Country, LT, LTZ, WT6.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
2020 - 2021GMCSierra 2500 HDAT4, Base, Denali, SLE, SLT6.6L V8Polished Tip Finish
2022GMCSierra 2500 HDAT4, Denali, SLE, SLT6.6L V8Polished Tip Finish
2023GMCSierra 2500 HDAT4, Denali, Pro, SLE, SLT6.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
2024 - 2026GMCSierra 2500 HDAT4, AT4X, Denali, Pro, SLE, SLT6.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
2020 - 2021GMCSierra 3500 HDAT4, Base, Denali, SLE, SLT6.6L V8Polished Tip Finish
2022GMCSierra 3500 HDAT4, Denali, SLE, SLT6.6L V8Polished Tip Finish
2023 - 2026GMCSierra 3500 HDAT4, Denali, Pro, SLE, SLT6.6L V8Polished Tip Finish, FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY