4"/4" American Thunder Exhaust 03-06 f250/f350 6.0 Turbo back

The aggressive sound of American Thunder, from Flowmaster exhaust!
These American Thunder Flowmaster exhaust systems have been designed with the latest exhaust technology available. Through this technology, you will experience improvements in acceleration, passing power, and fuel mileage. The key to these performance improvements is Flowmaster's use of mandrel-bent tubing. The tubing allows for superior exhaust gas flow, while aluminized steel construction allows for its corrosion-resistant qualities. These Flowmaster exhaust systems also feature a muffler(s) that'll give you plenty of Flowmaster sound outside of the vehicle, as well as inside of it. Every kit comes complete with all of the necessary hangers, clamps, and mounting hardware for an easy installation. So, if you want the aggressive sound of American Thunder, then these Flowmaster Exhaust systems are just what you need.