Slip-Ons represent the first step in the exhaust system tuning process, and they offer a great balance between price and performance. Change the nature of your bike by adding more power, improved performance, and the unique Akrapovič sound. Everything packed in stylishly designed Slip-On exhaust systems. The result of taking design very seriously is a beautifully crafted exhaust system with a titanium muffler outer sleeve and plenty of carbon fiber parts. Race-proven materials.The slip-on is available with two different link pipes for either high or low mount of the system. You can choose from:Low mount position: L-B12SO8T  (for 2017-2020 model years) and L-B12SO10 (for 2021 model year)Fitment notice for BMW R NineT models equipped with stock high mount dual-flow rear silencer: The low-positioned slip-on with link pipe can only be mounted if the pillion passenger frame is removed. An additional aluminium muffler holder from BMW’s accessories range (BMW product code 77 11 8 564 071) must be mounted, and covers for the main frame’s threaded fasteners (BMW product code 77 25 8 536 857) are also recommended to hide the unattractive screw connections on the main frame.High mount position: L-B12SO9T (for 2017-2020 model years) and L-B12SO11 (for 2021 model year)When installing the L-B12SO9T or L-B12SO11  link pipe, the passenger footpegs have to be removed.