Wiseco Piston Kit for Polaris 250 Trail Boss 1985-1999 PK1088

If you're running a Polaris 250 Trail Boss hard, factory pistons won't cut it. Wiseco's forged piston kit delivers the strength and thermal stability you need to push higher RPMs and sustained performance without risking catastrophic failure. This is a complete top-end solution that replaces guesswork with precision engineering.

The PK1088 kit uses high-silicone bar stock forged under controlled conditions, resulting in pistons that resist thermal expansion better than cast alternatives. You get a full complement of components—rings, wrist pins, circlips, and gasket kit—all engineered to work together as a system. Wiseco's non-interchangeable ring design means you can't accidentally mix components, ensuring compatibility and reliability every time you bolt it together.

Built for serious riders who demand reliability in harsh conditions, this kit is a bolt-on replacement that restores or upgrades your engine's top-end capability. Whether you're trail riding aggressively or looking to extend engine life after high-mileage use, Wiseco pistons are the choice of professional mechanics and dedicated enthusiasts.

• Forged high-silicone construction
• Fits Polaris 250 Trail Boss 1985-1999
• Includes rings, wrist pins, circlips
• Complete gasket kit included
• Reduced thermal expansion
• Bolt-on installation
• MPN: PK1088
• Non-interchangeable ring design
• Extreme temperature rated