This American Thunder exhaust system has been engineered and dyno tested to improve acceleration, horsepower and torque, and increase fuel economy. Flowmaster uses mandrel-bent tubing that allows for superior gas flow. Aluminized steel provides corrosion resistant quality so your
system will last. The American Thunder system comes with a two chamber
muffler that will give you an aggressive sound. Everything you need for
installation is included.
Super 40 Series Mufflers
Scavenger Crossover Assembly ("X-Pipe" Style)
3.00" Logo Embossed Stainless Steel Tips
Application:2004 Pontiac GTO 5.7L V8