Wiseco Piston Kit Standard Bore 93mm 12.5:1 Compression Polaris RZR XP 900 2011-2014 40046M09300

If you're pushing your RZR XP 900 to its limits, a stock piston won't cut it. The Wiseco Piston Kit delivers the compression ratio and durability you need to extract maximum horsepower while maintaining reliability in demanding off-road conditions. This is a precision upgrade that serious RZR owners trust when they want dependable power and engine longevity.

Wiseco pistons are engineered to tighter tolerances than OEM components, ensuring consistent ring seal and combustion efficiency across the RPM range. The 12.5:1 compression ratio is optimized for this platform, giving you measurable gains in throttle response and mid-range power without requiring fuel octane upgrades beyond pump premium. The lightweight aluminum construction reduces reciprocating mass, which improves engine responsiveness and allows higher RPM capability.

Installation is straightforward for anyone with basic engine rebuild experience—no exotic tools required. Just remember that this kit does not include a gasket set, so order one separately to complete your rebuild properly.

• Fitment: Polaris RZR XP 900 (2011–2014)
• Bore diameter: 93mm standard
• Compression ratio: 12.5:1
• Material: High-performance aluminum
• MPN: 40046M09300
• Installation: Bolt-on rebuild
• Gasket kit: Sold separately
• Ring seal: Precision engineered
• Weight: Reduced vs. stock