Optional available headers from the finest titanium 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, remapping is recommended.Optional headers fit also with Akrapovic standard (first fit) / BMW accessory Akrapovic silencer.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.