This is a full stainless-steel exhaust system with a beautifully finished carbon-fibre muffler sleeve and endcap. The Racing Line provides a great increase in power and torque, coupled with more linear delivery right across the entire rev range. It comes with a hexagonal muffler – including titanium inner parts to reduce weight – and an improved deeper sporty sound. An option to add a carbon-fibre muffler bracket is also available to complement the beautiful finish of this impressive system. The bike’s ECU must be remapped when the Racing Line system is installed.For perfect performance, throttle response, and durability, special mapping developed by Akrapovi? 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.