Yoshimura R-77 Carbon Fiber Full System Exhaust for 2013 Honda CB500F/CBR500R - One Size If youre looking for that competitive edge, look no further than the Race Series. These exhaust systems are designed with nothing but power in mind. Each Race Series system is developed in accordance with noise compliance regulations imposed by most racing sanctioning bodies worldwide. FOR CLOSED COURSE COMPETITION ONLY; NOT INTENDED FOR STREET USE All applications are marked with appropriate EPA noise emissions labels