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 carbon fibre muffler outer sleeve. Race-proven materials.Warning! EC Type approval is valid only for model years until 2006. EC type-approval is valid only when catalytic converter is installed.