GMC Sierra 2500HD Performance Exhaust - Rear - Flowmaster - American Thunder Cat-Back - Polished - `01-`07
GMC Sierra 2500HD Performance Exhaust - Rear - Flowmaster - American Thunder Cat-Back - Polished - `01-`07

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GMC Sierra 2500HD Performance Exhaust - Flowmaster American Thunder Cat-Back (Polished), 2001-2006 (2007 Classic). A rear-exit upgrade that delivers a richer, more assertive exhaust note.
Built around a dual-inlet 50 Series Big Block muffler that mounts after the catalytic converters, this system provides a moderate interior tone with a deep exterior growl. The mandrel-bent 3.5 in. aluminized steel tailpipe uses factory hangers and exits behind the right rear wheel for towing clearance. Includes a formed aluminum heat shield with stainless clamps, all hardware, and instructions. 3-year limited warranty. Fits 2001-2006 (2007 Classic) Sierra 2500HD/3500HD with 6.0L or 8.1L, 2WD/4WD, extended or crew cab, dual-inlet muffler.
Features
- American Thunder rear-exit cat-back
- Moderate interior / deep exterior tone
- 3.5 in. mandrel-bent aluminized tailpipe
- 4.0 in. polished 304 stainless tip with logo
- Factory-hanger install; parts and instructions included
Questions or want to schedule installation or customization? Call our Austin, Texas or Los Angeles, California area shops at 512-982-9393 (TX) or 562-981-6800 (CA). We offer installation and customization services at both locations.
Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov





