This offers the option to upgrade the Slip-On Line muffler to a full, complete system. It is made from perfectly welded stainless-steel tubes. It delivers improved sound when used in conjunction with the Slip-On Line, which gives it a racing note that will certainly be heard and appreciated. Power and torque are improved, especially from the mid-range upwards. Optional headers fit also with Akrapovič standard (first fit) silencer. For perfect performance, throttle response and durability, ECU remapping is recommended. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.