Manufactured by SPI Includes 3 pistons, ring sets, wrist pins, circlips as pictured SPI pistons are engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls All SPI pistons, rings, pins, circlips are manufactured to OEM specifications All individual components are interchangeable with original parts Piston weight is compatible with original piston T-Moly series with Teflon-Molybdenum coating T-Moly series pistons reduce friction, resist seizure, improve durability Made in Taiwan Pistons are for standard bore size 66.60mm Fits 1996 Polaris Ultra 680 RMK Polaris Ultra 680 SKS Polaris Ultra 680 SP 1997 Polaris 680 Ultra Polaris 680 Ultra SP Polaris 680 Ultra SPX Polaris 680 Ultra SPX SE Polaris 680 Ultra Touring 1998 Polaris 680 Ultra Polaris 680 Ultra Touring Polaris 700 XCR