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Vehicle Info NeededFLOWMASTERPART NUMBER: 389-817603
Force II Cat-Back Exhaust System 2011-2018 GM Silverado/Sierra 1500 6.2L V8
$1,11795
Ships on 09/08/2026
Lowest Price GuaranteeGM
Force II Cat-Back Exhaust System2011-2018 GM Silverado/Sierra 1500 6.2L V8 3.5" Tubing, 4" Polished SS Tips Single Side Exit 50 Series Big Block Muffler 409S Stainless Steel
FLOWMASTER MUFFLERS 817603 Features:
This Force II® Cat-back stainless steel exhaust system is designed for 2011-2018 Chevrolet Silverado and GMC Sierra 1500 trucks with the 6.2L engine. Features include large 3.50-inch mandrel-bent tubing flowing into a Flowmaster 50 Series Big Block™ muffler for a muscular exterior sound, while the built-in Helmholtz chamber helps control the interior resonance. The system uses the factory hanger locations for an easy installation and is finished off with a highly polished 4.00-inch 304 stainless steel tip embossed with the Flowmaster® logo. This bolt-on system delivers noticeable performance gains while offering moderate interior and exterior sound levels and is covered by our Lifetime Limited Warranty.- Dyno Tuned For Maximum Performance
- 50 Series Big Block Performance Muffler
- Large 3.50-inch Mandrel-bent Tubing
- Uses the Factory Hanger Locations
- Stainless Steel Construction
- Lifetime Limited Warranty
- Delta Flow Technology
- Flowmaster Quality
Improved Performance with a Moderate Exhaust Tone
Flowmaster Force II Exhaust Systems for Trucks and SUVs are perfect for anyone looking for a performance tone enhancement but concerned about installing an exhaust system that is too aggressive for daily street driving. These systems deliver a moderate interior and exterior tone and are suited to customers looking for efficiency improvements without loud noise.
Part TypeExhaust System
Product LineFlowmaster Force II Exhaust Systems for Truck & SUVs
BrandFLOWMASTER
Package Height14.5
Package Width16.3
Package Length67.5
Weight49.5 PG
Muffler Body Diameter12 in.
Tailpipe Diameter (In.)3.5
Muffler Inlet Inside Diameter3.50 in.
Hangers IncludedYes
Main Piping Diameter3.50 in.
Tail Pipe QuantitySingle
Inlet TypeClamp-On
Tip CutSlant
Exhaust Tip Material304 Stainless Steel
Catalytic Converter Quantity0
Exit LocationPassenger side
Inlet QuantityOne
Muffler Body Length22 in.
Sound LevelModerate
Muffler MaterialStainless steel
Muffler Body Material409 Stainless Steel
Exhaust Tip CutAngled
Gasket Or Seal IncludedNo
Exhaust Tip IntercooledNo
Pipe ColorSilver
System FinishNatural
Muffler Quantity1
Muffler Inlet Outside Diameter3.50 in.
Exit QuantityTwo
Tip MaterialStainless steel
Muffler Flanged OutletNo
Tip Quantity1
Exhaust Tip ResonatedNo
Exhaust TypeSingle
Catalytic Converter IncludedNo
Heat Shield IncludedNo
Part CategoryPerformance Parts
Hardware IncludedYes
Exhaust Tip WallSingle Wall
Exhaust Tip Quantity1
Exhaust Tip FinishPolished
Exhaust Tip EdgeRolled Edge Angle Cut
Valve IncludedNo
Muffler TypeChambered
Pipe Material409 Stainless Steel
Muffler Body Width12 in.
Tail Pipe Tapered OutletNo
Muffler Body ShapeOval
Mounting Bracket IncludedNo
Muffler Outlet Quantity1
Muffler FinishBlack High-Temperature Paint Finish
Inlet Diameter3.50 in.
Clamps IncludedYes
Muffler StyleChambered
Tip Outlet Size4 in (101.6 mm)
FinishNatural
Exit StyleSingle Out Side
Muffler Body Height5 in.
Tip IncludedYes
Clamping TypeFlat Band
Muffler Flanged InletNo
Spring Bolt Kit IncludedNo
Muffler Series50 Series Big Block
QuantitySold as a kit
Muffler IncludedYes
Exhaust Tip ConnectionWelded
System StyleCat Back
Tail Pipe Outlet Outside Diameter3.50 in.
Muffler ConfigurationSingle inlet/Single outlet
System MaterialStainless steel
Valve TypeNot Applicable
Tip Edge StyleRolled edge
Tip ShapeRound
Intermediate Pipe Diameter3.5 in (88.9 mm)
Exhaust Tip Diameter4 in.
Part FitmentDirect Fit
Vendor Part Number817603
Package Qty1
Package TypeEA
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