Designed to increase the horsepower and torque throughout the entire power curve and give you a noticeable power increase that is very usable and beneficial, no matter what your riding style or ability is. Features include space age internal packing for maximum packing life. High-flow modular end cap. Internal core shape uses high-flow technology. Enhanced sonic evacuation provides for higher flow and increased power. Includes removable spark arrestor.

Designed to work with stock OEM header

Note: For closed course competition use only.

Fits:

• 2006 – 2013 YZ250F
• 2006 – 2014 WR250F