The Rossier R5 Exhaust System with the Anti-Reversion Chamber II. These Exhaust systems for the YFZ 450/R have been tested at the AMA pro MX nationals with great results. The Chambers help smooth out the torque curve. On the track, the quad accelerates better and on-off throttle modulation is improved which gives the rider better control. This is not a Resonance chamber like other major manufactures use. This is a full system available with billet aluminum endcaps!
The Power Commander 6 will tune your machine perfectly while running the Rossier R5 Exhaust making more horsepower!
