Vance Hines Powershots Exhaust for Yamaha Roadstar XV1600 1999-2003 XV17000 2004-2007 Powershots feature two 2 1/2 muffler bodies, dual power chambers, a single chrome 360 heat shield and unique dual-staggered, twin-layered slash-cut end tips. Hidden under the heat shields, the Power Chamber crossover system uses the volume of both mufflers to improve scavenging of each cylinder providing more efficient combustion for horsepower and torque. The end product is music to the throttle, and to the ears. Baffles, mounting hardware and easy-to-understand instructions are included for a hassle-free, perfect fit every time. Made in the USA.