This option upgrades the Slip-On Line muffler to a full, complete system. It is made from perfectly welded stainless steel tubes. It improves sound when used in conjunction with the Slip-On Line (Carbon) to produce a true sporty tone, and when fitted to the Slip-On Line (Titanium) it delivers a racing sound that will certainly be noticed and appreciated. Power and torque are improved through the whole rev range. When mounting the optional headers to the EC/ECE type-approved Slip-On Line (Carbon) exhaust system, the EC/ECE type approval is no longer valid. 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.