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 plenty of carbon fibre parts. Race-proven materials. EC/ECE type approved.FITMENT NOTICE FOR US MARKET: Exhaust system fits on 2021 ZX-6R and ZX-6R 636 US model.