Akrapovi? titanium Evolution systems are designed for riders that demand maximum performance from their motorcycle. The systems are significantly lighter compared to the stock exhaust system and feature exceptional production quality, hi-tech materials, and of course increased engine performance combined with pure racing sound output. Perfect welds and a combination of racing materials like titanium and carbon fibre.Passenger footrest has to be removed for installation.For perfect performance, throttle response and durability special developed mapping from Dynojet is recommended. Please visit http://www.powercommander.com/powercommander.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.