GMC Sierra 3500HD Performance Exhaust - Flowmaster - American Thunder Cat-Back - `20-`26
GMC Sierra 3500HD Performance Exhaust - Flowmaster - American Thunder Cat-Back - `20-`26

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GMC Sierra 3500HD Performance Exhaust – Flowmaster American Thunder Cat-Back, 2020-2026. Built for 6.6L gas Crew Cab models with the 6.5 ft bed, it delivers a moderate to aggressive exhaust note in a direct bolt-on, emissions-legal package.
It features a stainless 50 Series HD muffler with Delta Flow and dual 3.00 in 409 stainless mandrel-bent tailpipes. Choose dual out rear or dual out side exits behind the wheels, a layout well suited for towing. Finished with 4.00 in polished 304 stainless tips, it reuses factory hanger locations, includes hardware, and carries a Lifetime Limited Warranty. Fits 2020-2026 Sierra 2500HD/3500HD Crew Cab, 6.5 ft bed; not for trucks with a 5th wheel hitch.
Features
- Moderate to aggressive interior/exterior tone
- 50 Series HD muffler with Delta Flow
- Dual 3.00 in 409 SS mandrel-bent tailpipes
- Dual rear or side exits for towing clearance
- Bolt-on, emissions-legal; factory hangers and hardware included
Questions or ready to order? Call us. We offer installation and customization at our Austin, Texas and Los Angeles, California area shops: 512-982-9393 (TX), 562-981-6800 (CA).
Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.
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