Wiseco's complete top end piston kits are offered for nearly every popular application. These kits contain everything you need to complete your rebuild the right way. 4-stroke kits feature a 'race-ready' dome finish with smooth edges for improved combustion flow. Most PK/SK/WK/VT kits from Wiseco feature a complete top end gasket kit . 4-stroke race applications feature Wiseco's ArmorGlide skirt coating to provide reduced friction and noise to contribute to increased horsepower. Dedicated forgings used for superior strength to weight ratio. High-Performance ring kit and alloy pin included with each piston kit.