Features: Designed for all-purpose 2-stroke riding. Durability, longevity and increased horsepower. Dedicated forging design for strength-to-weight optimization. Extra lightening operations for enhanced throttle response. Engineered, forged, and machined in the USA. Piston is made in the USA. Nikasil bore cylinders will require sleeving or replating. Kit Includes: • 1x Piston • 1x Ring Set #2165CS • 1x Wrist Pin #S467 • 2x Circlips #CW15.