Description

Unlock more power and torque from your Polaris 570 with the REV6 Master Big Bore Top End Rebuild Kit (625cc). Designed for serious riders, this setup delivers increased displacement, stronger mid-range pull, and reliable long-term performance. If your stock engine feels tired or underpowered, this upgrade gives your UTV a second wind on any trail or job site.

Each component in this kit meets or exceeds OEM standards and has been precision-tested by the REV6 team for perfect fit and performance. In addition, the nickel-plated cylinder and forged Wossner piston provide superior heat control and durability under demanding riding conditions.

This Kit Includes:

• (1) Wossner Piston Kit (Big Bore) REPLACES OEM#: 89551D500
• (1) Cylinder (Big Bore) REPLACES OEM#: 760-16-11301
• (1) Tensioner REPLACES OEM#: —
• (1) Top End Gasket Kit REPLACES OEM#: —

Fits the Following Applications:

• 2018–2024 Polaris RZR 570
• 2018–2024 Polaris Ranger 570

Take Action

Upgrade your Polaris with proven REV6 Powersports parts engineered to handle more compression and higher RPMs. Review our Warranty Policy for full coverage details, and visit the Help Center for installation and shipping info.

Need help choosing the right rebuild kit? Check our Engine Rebuild Kit Guide or FAQ for expert advice. You can also Contact Us directly for personalized support.

Thank you for choosing REV6 — your trusted source for Powersports engines and parts. We proudly offer veteran and servicemember discounts as a thank-you for their service.