The result of taking design very seriously is a very stylishly shaped black-coated muffler. Slip-Ons represent the first step in the exhaust system tuning process, and they offer a great balance between price and performance. Installation is a snap. In addition to design effects and improved power delivery, Slip-Ons also enhance the sound. Let your bike stand out with more power, beautiful design, and the unique Akrapovic sound.Exhaust system is compatible with BMW side cases.