Flowmaster

Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System

SKU 817933

MPN flo817933

$1117.95 · Out of stock

Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System
Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System
Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System
Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System
Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System
Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System
Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System

Flowmaster 20-25 GM 2500HD 6.6L CCB American Thunder Cat-Back Exhaust System

The Flowmaster® American Thunder® Cat-back exhaust system for the 2020-2026 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L gas engine, has a moderate to aggressive sound level inside and outside of the truck, with all of the performance benefits you expect from Flowmaster®. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel 50 Series HD™ 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 a pair of large 4.00-inch polished 304 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.

Confirmed vehicle fitment
YearsMakeModelSubmodelDrive
2020–2026ChevroletSilverado 2500 HDHigh Country—
2020GMCSierra 2500 HDBase—
2021–2026GMCSierra 3500 HDSLE—
2020–2026ChevroletSilverado 2500 HDLTZ—
2022–2026GMCSierra 2500 HDDenali—
2020–2026ChevroletSilverado 2500 HDCustom—
2021–2026GMCSierra 3500 HDDenali—
2021GMCSierra 3500 HDBase—
2020GMCSierra 2500 HDAT4—
2020GMCSierra 2500 HDSLT—
2023–2026GMCSierra 2500 HDPro—
2022–2026GMCSierra 2500 HDSLT—
2020GMCSierra 2500 HDSLE—
2021–2026ChevroletSilverado 3500 HDLTZ—
2021–2026GMCSierra 3500 HDSLT—
2020–2026ChevroletSilverado 2500 HDWT—
2021–2026ChevroletSilverado 3500 HDHigh Country—
2024–2026GMCSierra 2500 HDAT4X—
2023–2026GMCSierra 3500 HDPro—
2021–2026ChevroletSilverado 3500 HDLT—
2020–2026ChevroletSilverado 2500 HDLT—
2021–2026GMCSierra 3500 HDAT4—
2021–2026ChevroletSilverado 3500 HDWT—
2022–2026GMCSierra 2500 HDAT4—
2024–2026ChevroletSilverado 2500 HDZR2—
2022–2026GMCSierra 2500 HDSLE—
2020GMCSierra 2500 HDDenali—
Specifications
CategoryExhaust, Mufflers & Tips
Sub-CategoryCatback
UPC700042039760
CARB ApprovedYes
Prop 65 WarningY
Weight64.65 lb
Dimensions (L×W×H)58 × 16 × 11.8 in

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