Slip-Ons represent the first step in the exhaust system tuning process, and they offer a great balance between price and performance. Sporty and lightweight Slip-On Line exhaust systems are a perfect match for this great Aprilia. Installation is a snap. The visual change comes with stylishly shaped carbon fibre muffler and end cap. In addition to design effects and improved power delivery, Slip-Ons also enhance the Aprilia sound. Let your bike stand out with more power, beautiful design, and the unique Akrapovi? sound of Slip-Ons.Passenger footrest for mounting needed. If you want mount the Slip-On without passenger foot rest please order optional aluminium bracket. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.