This 2-into-2 exhaust system offers a very one of a kind look as the two header pipes go over-under each other yet you wont sacrifice any performance, in fact this system is one of the higher horsepower and torque gaining systems out in the market. Features a unique over/under style that provides significant performance gains and an aggressive sound that's guaranteed to turn heads Made with Double-Stepped headers which create a superior scavenging effect for improved exhaust flow and increased power and torque over stock Larger diameter 2.5" muffler gives a deeper, throaty rumble Features full length heat shields with custom laser cut Rinehart Racing logo Includes 18mm 02 ports for easy dyno tuning Bung adapter kit 544-696 required for models with 12mm O2 sensors American Made Pipes for American Made Bikes.