Our Fatt Azz single pipe produces huge horsepower and torque! When used with our BMP performance manifold, your motor will gain 15-17 HP over stock! This pipe has a very broad powerband with a ton of grunty torque making peak power from 7750-7950 RPM. It fits right into the stock muffler or you can use our lightweight muffler for even less weight. The pipe installs in minutes and works great! Power Commander recommended for proper fuel tuning. BMP performance manifold required. For best results use with the BMP Stage 2 Clutch Kit. Also available for ported and big bore motors. See drop down menu.