GMC Sierra Performance Exhaust - Flowmaster - American Thunder Cat-Back - Black - `24-`26
GMC Sierra Performance Exhaust - Flowmaster - American Thunder Cat-Back - Black - `24-`26
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GMC Sierra Performance Exhaust - Flowmaster American Thunder Cat-Back, Black (2024-2026). Give your Sierra 1500 6.2L a deeper V8 tone and rugged Flowmaster build quality in a bolt-on package.
Built from 16-gauge 409 stainless steel, this system uses a 3.5-inch inlet feeding a tuned 50 Series HD muffler, then dual 2.5-inch mandrel-bent tailpipes exiting the factory bumper cutouts with quad 4.0-inch black ceramic tips. The active valve with integrated turndown keeps factory dash control: run closed in Normal, or open in Sport/Off-Road for more sound. Testing shows gains up to 15 hp and 13 lb-ft at the wheels. Uses factory hangers, includes hardware/instructions, and carries Flowmaster’s Lifetime Limited Warranty. Fits 2024-2026 Sierra 1500 6.2L (2WD/4WD) with bumper exhaust bezels.
Features
- American Thunder cat-back for 2024-2026 Sierra 1500 6.2L
- 409 stainless, 16-gauge, mandrel-bent tubing
- 3.5-inch inlet to tuned 50 Series HD muffler
- Dual 2.5-inch tails, quad 4.0-inch black ceramic tips
- Active valve control; dash-selectable modes
- Factory-style hangers; bolt-on installation
- Tuned resonance control to reduce interior drone
Have questions or planning a build? Call 512-982-9393 (TX) or 562-981-6800 (CA). We offer installation and customization at our Austin, Texas and Los Angeles, California area 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
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Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
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