Optional available headers from the finest stainless steel offer an upgrade to a full system when used with the Akrapovic Slip-On exhaust system. Let your bike stand out with more power, beautiful design, and the unique Akrapovic sound.For perfect performance, throttle response and durability special developed mapping from Dynojet has to be used. Please visit http://www.powercommander.com/powercommander.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.