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.Catalytic converter is included within the system.