Developed through hours of track and dyno testing to produce the best exhaust system for the all new YZ450F.
Developed through hours of track and dyno testing to produce the best exhaust system for the all new YZ450F. Features an aluminium muffler shell, stainless steel tubing, cone-style end cap and is completely rebuildable. Meets the MA race 94DB noise regulations. Note: For closed-course competition only.