817541 American Thunder Cat-Back Exhaust System 2011-2019 GM Silverado/Sierra 2500HD 6.0L

Vehicle Info Needed

FLOWMASTERPART NUMBER: 389-817541

817541 American Thunder Cat-Back Exhaust System 2011-2019 GM Silverado/Sierra 2500HD 6.0L

Name: 817541 American Thunder Cat-Back Exhaust System 2011-2019 GM Silverado/Sierra 2500HD 6.0L
Brand: FLOWMASTER
SKU: 389-817541
Price: 1349.95 USD
Availability: InStock

^$1,349⁹⁵

Ships on Sep 04, 2026

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2011-2018 GM Silverado/Sierra 2500HD 6.0L (Crew Cab/Std Bed 6.5 ft)
4" Tubing
4" Polished SS Tips
Dual Out Rear/Dual Out Side Exit
50 Series HD Muffler
409S Stainless Steel

1

Part TypeExhaust System

BrandFLOWMASTER

Package Height12.0

Package Width16.0

Package Length58.25

Weight79.0 PG

Tailpipe Diameter (In.)3

Muffler Inlet Inside Diameter3.50 in.

Hangers IncludedYes

Main Piping Diameter4 in.

Tail Pipe QuantityDual

Inlet TypeFlanged

Tip CutSlant

Exhaust Tip Material304 Stainless Steel

Catalytic Converter Quantity0

Exit LocationSplit Rear

Inlet QuantityOne

Muffler Body Length18.25 in.

Sound LevelAggressive / Moderate

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 Diameter3.63 in.

Exit QuantityTwo

Tip MaterialStainless steel

Muffler Flanged OutletNo

Tip Quantity2

Exhaust Tip ResonatedNo

Exhaust TypeDual

Catalytic Converter IncludedNo

Heat Shield IncludedNo

Part CategoryPerformance Parts

Hardware IncludedYes

Exhaust Tip WallDouble Wall

Exhaust Tip Quantity2

Exhaust Tip FinishPolished

Exhaust Tip EdgeAngle Cut

Valve IncludedNo

Muffler TypeChambered

Pipe Material409 Stainless Steel

Muffler Body Width10 in.

Tail Pipe Tapered OutletNo

Muffler Body ShapeOval

Mounting Bracket IncludedYes

Muffler Outlet Quantity2

Muffler FinishBlack High-Temperature Paint Finish

Inlet Diameter3.50 in.

Clamps IncludedYes

Muffler StyleChambered

Tip Outlet Size4 in (101.6 mm)

FinishNatural

Exit StyleDual Out Rear

Muffler Body Height5 in.

Tip IncludedYes

Clamping TypeFlat Band

Muffler Flanged InletNo

Spring Bolt Kit IncludedNo

Muffler Series50 Series HD

QuantitySold as a kit

Muffler IncludedYes

Exhaust Tip ConnectionClamp-On

System StyleCat Back

Tail Pipe Outlet Outside Diameter3 in.

Muffler ConfigurationSingle inlet/Dual outlet

System MaterialStainless steel

Valve TypeNot Applicable

Tip Edge StyleHalf-rolled edge

Tip ShapeRound

Intermediate Pipe Diameter3.5 in (88.9 mm)

Exhaust Tip Diameter4 in.

Part FitmentDirect Fit

Vendor Part Number817541

Package Qty1

Package TypeEA

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