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 mapping developed by Akrapovic R&D in collaboration with our partner Rapid Bike by Dimsport has to be used. Please visit https://www.dimsport.us/en/rapid-bike/akrapovic/, where you can download the mapping .THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.