The Akrapovic 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 our partner Dynojet has to be used. Please visit http://www.powercommander.com/powercommander. THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.