Developed through hours of track and dyno testing to produce the best exhaust system for the all new YZ250F. Features an aluminium muffler shell, stainless steel tubing, cone-style end cap and is completely rebuildable. We have also added a PHD Chamber (also known as a Resonance Chamber) in the middle section of the header pipe. This helps to reduce noise levels and it also improves bottom end power. Meets the MA race 94DB noise regulations.

Note: For closed-course competition only.

Fits:

• 2010 – 2013 YZ250F