Description
Transform your 2024–2025 Chevrolet Silverado or GMC Sierra 1500 6.2L with the Flowmaster American Thunder Cat-Back Exhaust System—the ultimate blend of performance, aggressive tone, and factory integration. Designed to fit both 2WD and 4WD models, this system adds muscle to your truck’s voice and power to its wheels.
Constructed from mandrel-bent 409 stainless steel tubing, this cat-back system ensures long-term durability and unrestricted exhaust flow. It features a 3.5-inch inlet pipe feeding into a performance-tuned 50 Series HD chambered muffler, which delivers a deep, aggressive yet refined exhaust note—without cabin drone.
The dual 2.5-inch tailpipes exit through the factory bumper cutouts and are finished with quad 4.0-inch black ceramic-coated tips for a bold, high-performance appearance.
This system includes an integrated active valve control with turndown, allowing seamless compatibility with your truck’s factory drive modes. Enjoy stealth mode when the valve is closed in Normal mode or unleash the full Flowmaster sound in Sport or Off-Road mode.
Dyno-tested gains of up to 15 horsepower and 13 lb-ft of torque at the rear wheels provide real-world performance you can feel. The bolt-on design reuses factory hanger locations for an easy, no-fabrication installation.
Key Features:
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Fits 2024–2025 Silverado/Sierra 1500 6.2L (2WD/4WD)
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409 stainless steel construction for lasting performance
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50 Series HD chambered muffler offers powerful tone with no interior drone
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Active valve control integrates with OEM drive modes for sound customization
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Quad 4.0-inch black ceramic tips exiting through factory cutouts
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Up to 15 HP and 13 lb-ft torque gains at the wheels
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Direct-fit bolt-on installation using stock hangers
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Backed by Flowmaster’s Lifetime Limited Warranty
What’s Included:
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Complete cat-back exhaust system
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All installation hardware and clamps
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Detailed installation instructions
Unleash the true voice and potential of your GM 1500 truck with the Flowmaster American Thunder system—engineered for enthusiasts who demand performance, sound, and style.
