The Akrapovi? Racing system is designed for riders who demand maximum performance. Racing system is lighter if compared to stock exhaust system and features exceptional production quality, hi-tech materials and of course increased engine performance combined with pure racing sound output.For perfect performance, throttle response and durability special developed mapping from Dynojet is recommended. Please visit http://www.powercommander.com/powercommander.FITMENT NOTICE FOR US MARKET: Exhaust system fits on 2019 S 1000 RR US model. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.