Description

Polaris Ranger / Sportsman 450 & 500 Prostar Standard Piston Kit (2017–2022)

Restore compression and refresh your engine with this Prostar Standard Piston Kit for applicable 2017–2022 Polaris Ranger and Sportsman 450 / 500 models. Built around a moly forged piston, this kit is a strong option for top-end service, maintenance rebuilds, and engine refresh projects.

When piston wear begins to affect performance, replacing the piston during service helps support proper sealing, dependable operation, and a cleaner rebuild process.

This Kit Includes

• Moly Forged Piston

Fitment

• Polaris Ranger 450
• Polaris Ranger 500
• Polaris Sportsman 450
• Polaris Sportsman 500
• Applicable 2017–2022 models

Why Replace the Piston?

The piston plays a major role in compression, combustion, and power delivery. Over time, heat cycles and normal wear can reduce sealing performance and engine efficiency.

Replacing the piston during top-end service helps support smoother operation and can reduce the chance of additional teardown later.

Helpful Related Parts

• Polaris Prostar Cylinder
• Top End Rebuild Kit
• Complete Top End Rebuild Kit
• Engine Rebuild Kit
• Gasket & Seal Kit

If you’re planning a larger rebuild, review our Engine Rebuild Kit Guide.

Support & Resources

Need help confirming fitment before ordering? Visit Contact REV6.

You can also review our Warranty Policy, browse the FAQ, or visit the Help Center.

Need additional flexibility for larger rebuild projects? Explore our financing options.

Take Action

Order your Polaris Ranger / Sportsman 450 & 500 Prostar Standard Piston Kit and keep your rebuild moving with components selected to support dependable engine performance.

Thank you for choosing REV6 — your trusted source for high-performance powersports engines and parts. Proudly supporting U.S. veterans and servicemembers with special discounts.