Description
Overview
The Flowmaster American Thunder Cat-back Exhaust System is built for the enthusiast who wants the aggressive look and sound of a NASCAR race truck combined with the real-world performance benefits of a genuine Flowmaster cat-back. This D.O.S.S. (Dual Out Same Side) configuration routes both tailpipes out the same side of the vehicle, delivering a purposeful, race-inspired stance while flowing exhaust gases efficiently from the mufflers to the tips.
At the heart of the system is a specially designed Super 40 Series performance muffler, tuned to produce a moderately aggressive exterior sound with a moderate interior tone. In short, this is exhaust that makes your performance heard without overwhelming the cabin, striking a balance that daily drivers and weekend enthusiasts alike appreciate.
Construction & Design
Every American Thunder system is manufactured from mandrel-bent aluminized steel tubing, which maintains a consistent pipe diameter through every bend to preserve exhaust flow and support improved throttle response. The 3.00-inch inlet feeds into the Super 40 Series muffler, which channels exhaust into dual 2.50-inch tailpipes. The setup is finished with a pair of large 3.00-inch polished stainless steel tips for a clean, high-visibility exit that complements the aggressive character of the system.
Key Benefits
Like all Flowmaster systems, this cat-back is engineered to deliver more than just sound. Owners can expect improved throttle response, added power, and better mileage compared to a restrictive factory exhaust. The kit is designed for an easy fit and includes all necessary parts and hardware, using U-Bolt clamping for a straightforward, bolt-on installation.
- American Thunder Series cat-back with D.O.S.S. (Dual Out Same Side) design
- Mandrel-bent aluminized steel tubing with a silver pipe finish
- Specially designed Super 40 Series performance muffler (included)
- Dual 2.50-inch tailpipes with a pair of large 3.00-inch polished stainless steel tips
- 3.00-inch inlet diameter
- U-Bolt clamping type with all hardware included for quick installation
- Aggressive exterior sound with a moderate interior tone
- CARB (California) compliant — Emission Code 5
Sound & Performance Character
The Super 40 Series muffler produces a moderately aggressive exterior sound paired with a moderate interior tone, making this an ideal choice for the enthusiast who wants their truck to be heard on the street while remaining comfortable behind the wheel. The dual tips and dual-out-same-side routing give the vehicle the unmistakable look of a race truck.
Fitment & Compliance
This system is configured for 2WD applications and is CARB (California) compliant. Please note the California Proposition 65 warning associated with this product. A heat shield is not included. Choose the configuration that fits your vehicle and driving goals, and enjoy a proven Flowmaster upgrade backed by mandrel-bent quality construction.
