Samson Exhaust is proud to introduce its new Powerflow III series of exhausts -said to be the most powerful two-into-one exhausts ever made. Years of research and development went into these new Powerflow III exhausts. The power is generated through a series of chambers, which Samson refers to as the "Power Chamber" which helps condense and intensify exhaust flow, resulting in high horsepower and torque. The results are incredible…Independent dyno testing has shown that by just changing out the stock pipes with this new Powerflow III two-into-one system, riders will experience up to a 20% increase in both horsepower as well as torque. With Samson’s new system, you can take a stock HD and turn it into a high performance bike by simply changing out the pipes.