The Slip-On represents the first step in exhaust system tuning. It is simple to install and replaces a stock muffler. It also offers the best combination of price and performance. With the Akrapovic Slip-On system you will get more power, more torque, and less weight. The Akrapovic Slip-On system gives your scooter that unmistakable deep resonant Akrapovic sound and also dramatically changes its visual appearance. Each product features Akrapovic’s finest carbon fibre end caps. EC type-approval is valid only when catalytic converter is installed.The Akrapovic exhaust system is not compatible for combination with the Vespa original chrome kit or rear side protection.