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.
Specialty 5" X 10" mufflers
3.50" Rolled Edge Stainless Tip
SOR
Over the Axle design
Part Number 17421 Fits:
2005-2009 Ford Mustang V6