Looking for a aggressive to moderate exhaust note on your 2020-2026 Chevrolet Silverado 2500 HD, 3500 HD, GMC Sierra 2500 HD, 3500 HD? This American Thunder cat-back exhaust system trades the restrictive factory piping for mandrel-bent 409 stainless steel tubing and ends in dual side exit 4 in. polished tips.

Flowmaster 817933 Features:

• 3 in. mandrel-bent 409 stainless steel tubing in 16-gauge.
• Dual Side Exit with 4 in. polished tips.
• American Thunder series chambered muffler for aggressive to moderate sound.
• Clamps and factory-style hangers for the stock locations are included.

Flowmaster 817933 Applications:

• 2020-2026 Chevrolet Silverado 2500 HD 6.6L
• 2020-2026 GMC Sierra 2500 HD 6.6L
• 2021-2026 Chevrolet Silverado 3500 HD 6.6L
• 2021-2026 GMC Sierra 3500 HD 6.6L

Flowmaster 817933 Compatibility Notes:

• Fits 2020-2026 Chevy Silverado/GMC Sierra 2500HD/3500HD trucks with 6.6L gas engine. Crew Cab/6.5ft bed only. Will not fit models with 5th wheel tow hitch installed.

The Flowmaster American Thunder Cat-back exhaust system for the 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.Notes: Fits Crew Cab with 6.5' bed length, 159-inch wheelbase only.