Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is built for the driver who wants a subtle custom appearance with all the performance benefits a Flowmaster Cat-back system provides. Engineered to deliver a deep, powerful exterior tone paired with a mild to moderate interior sound level, this American Thunder system gives you serious presence on the outside while keeping things fairly mellow inside the cab. It’s an aggressive-yet-moderate setup that sounds great without overwhelming your daily drive.
At the heart of the system is the Super 50 Series performance muffler, purpose-built to control resonance and keep the interior tone comfortable while still letting your engine breathe. Mandrel-bent 3.00-inch aluminized steel tubing flows into a specially designed resonator and on into the muffler, promoting smooth exhaust flow from the cat-back for improved throttle response, power, and mileage.
Key Benefits
Flowmaster designed this American Thunder system for both sound and function. The dual 2.50-inch tailpipe configuration is finished with 3.00-inch polished stainless steel tips for a clean, custom look at the rear of your 4WD vehicle. Because the system utilizes the factory hanger locations, installation is straightforward and every necessary part and piece of hardware is included in the kit.
- Deep, powerful exterior tone with a mild to moderate interior sound level
- Mandrel-bent 3.00-inch aluminized steel tubing for smooth, efficient flow
- Super 50 Series performance muffler plus a specially designed resonator
- Dual 2.50-inch tailpipes finished with 3.00-inch polished stainless steel tips
- Silver pipe finish, U-bolt clamping, and factory hanger locations for an easy fit
- CARB (California) compliant, Emission Code 5
Sound & Performance
The American Thunder series is engineered to strike a balance between attitude and everyday livability. Outside the vehicle you get the aggressive, throaty note Flowmaster is known for, while inside the cabin the Super 50 Series muffler and resonator work together to keep the tone from being overwhelming. Along with the improved exhaust flow, you’ll enjoy the classic Flowmaster benefits of better throttle response, added power, and improved mileage.
Fitment & What’s Included
This complete cat-back kit includes the muffler and all necessary parts and hardware for a bolt-on installation using U-bolt clamps and the factory hanger locations. It is configured for 4WD applications and carries a California Proposition 65 warning. Prefer a full stainless steel build? Flowmaster offers system #817342, a full stainless steel exhaust system backed by a Lifetime Limited Warranty, for those who want the ultimate in corrosion resistance.
This American Thunder Cat-back Exhaust System is covered by a 3-year Limited Warranty.








