Description
Overview
The Flowmaster American Thunder Crossmember-Back Exhaust System is built for the enthusiast who wants performance they can hear. Engineered as a true dual crossmember-back setup, this system delivers a moderate to aggressive interior and exterior tone that announces your presence without droning on the open highway. It’s the ideal upgrade for the driver who demands both attitude and function from their exhaust.
At the heart of the system is a pair of specially selected Super 44 Series performance mufflers (muffler part number 942546), which flow into 2.50-inch mandrel-bent tailpipes for smooth, unrestricted airflow. A built-in H-pipe crossover balances exhaust pulses for a fuller, more refined sound and improved scavenging across the rev range.
Construction & Quality
Every component is constructed from durable 16-gauge mandrel-bent aluminized steel tubing, engineered with an easy fit in mind. The system is designed to route through the factory rear valance exhaust cutouts, giving you a clean, factory-style exit with a serious performance edge. To finish the look, a pair of 3.00-inch polished stainless steel tips add just the right amount of chrome bite at the rear bumper.
Key Benefits
Like all Flowmaster exhaust systems, the American Thunder delivers real-world gains beyond just sound. Expect improved throttle response, added power, and better mileage — the kind of measurable performance that makes this upgrade pay off every time you hit the gas.
- True dual crossmember-back design with built-in H-pipe crossover
- 16-gauge mandrel-bent aluminized steel tubing for strength and flow
- Dual Super 44 Series mufflers (PN 942546) for an aggressive tone
- 2.50-inch inlet with mandrel-bent 2.50-inch tailpipes
- Included 3.00-inch polished stainless steel exhaust tips
- All hangers and hardware included for a straightforward installation
- Exits through the factory rear valance cutouts
- CARB (California) compliant, Emission Code 5
Options & Warranty
This aluminized steel system is covered by Flowmaster’s 3-Year Limited Warranty. If you prefer stainless steel construction for maximum corrosion resistance and longevity, the optional system #817281 is available and backed by Flowmaster’s Lifetime Limited Warranty. Choose the configuration that best matches your goals and driving conditions.
Fitment Notes
This system is designed for 2WD applications. Please note that it does not fit convertibles or vehicles equipped with staggered shocks. The system does not include a heat shield, header reducer cones, or downpipes for factory manifolds. This product carries a California Proposition 65 warning.
