The Racing Line represents a full step in the exhaust system tuning process and offers a great balance between price and optimum performance. Racing performance exhaust systems are designed for riders that demand maximum performance from their motorcycle. The systems are lighter compared to the stock exhaust system and feature exceptional production quality and increased engine performance combined with pure racing sound output. A combination of racing materials like carbon fibre for the muffler outer sleeve and for the end cap give these exhaust systems a racing touch.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.FITMENT NOTICE FOR US MARKET: Exhaust system fits on 2021 ZX-6R and ZX-6R 636 US model.