It is finished with an eye-catching heatshield, inspired by those on the Yamaha R6 and R1. Impressive performance increases of 4.3 kW (5.9 hp) at 9,700 rpm and an added +2.9 Nm at 5,500 rpm have been achieved when tested on the Akrapovi? Dyno against a standard stock exhaust. The racing sound matches the bike's sporting credentials. A black-coated aluminium muffler bracket for the R7 without the passenger foot-pegs is available as an option.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE. Akrapovic have 30 years of experience.