YAMAHA YZ250F 2007-13 Signature RS-4 SO SS-AL-CF

Compatible With These Models:

YAMAHA YZ250F 2007-13 Signature RS-4 SO SS-AL-CF

Yoshimura took the time to develop and test in order to deliver the best exhaust system available and the results were worth the wait. We took everything we have learned over the last several years with our world famous RS-4 muffler and revised it with the latest materials and an updated spec that makes this new model perform.

The performance gains that were realized on this system are nothing short of amazing. The dyno tells us that this new RS-4 system gained 3 horsepower over the stock system plus increased torque throughout the entire RPM range.

*Please note that there is not a carbon fiber option available for this system.

Pentagonal-shaped sleeve

Front muffler cap functions as a polyresonant chamber which helps reduce noise

Two-stage stepped baffle

Carbon fiber end-cap

Stainless steel header, tail-pipe with aluminum muffler