Wiseco Yamaha YFM660 Raptor/Grizzly/Rhino 9.91 CR Piston Kit

The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.

• Improved tensile strength of forged material optimizes strength and service life
• Designed and built for each specific 4-stroke powersports engine
• Dedicated forgings allow for optimized strength-to-weight ratio
• Includes high-quality piston rings, wrist pin(s), and circlips
• Engineered, forged, and machined in the USA in Mentor, OH
• 100.50 mm Bore, 9.9:1 CR

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