The patented Resonance Chamber Technology enhances and refines exhaust pressure. Its patented core shape lowers sound level while maintaining maximum power output, and the patented canister shape increases internal volume for more sound-absorbing material. Factory Forward Engineering centralizes mass and is less prone to impact damage.

Maintenance is easy remove four screws on the front end cap, and the innovative rear end cap simplifies the installation of the spark arrestor (sold separately) or tuning tip inserts. Includes QuietCore 94 dBA insert. Meets most sound requirements.

It is compatible with stock or GYTR header and made in the U.S.A.

This accessory is restricted to closed-course use.

Fits:

• 2014 – 2017 YZ250F
• 2015 – 2016 WR250F
• 2015 – 2016 YZ250FX