When you want more grunt out of your 570, this Master Big Bore Top-End Kit from REV6 has you covered. First, we fit a new 625cc cylinder bored and honed for a precise ring seal. Then, a forged Wössner piston kit steps in to deliver rock-solid strength under boost and extended high-RPM use. Furthermore, the complete top-end gasket set locks out leaks—even under extreme heat—while the upgraded timing chain tensioner keeps valve timing rock steady. Consequently, you’ll regain lost power and enjoy smoother throttle response on every ride.

Moreover, every component is selected and assembled by our Master Engine Technicians. In addition, we back the kit with a 1-year warranty and include nationwide shipping both ways, so core returns and rebuilds are hassle-free. Therefore, whether you’re pushing dunes, tackling trails, or putting in work, this all-in-one kit ensures your Polaris runs stronger than new.

Includes the following parts: