Manufactured by SPI Includes 2 pistons, ring sets, wrist pins, wrist pin bearings 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, bearings 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 66.50mm Fits 1996 Arctic Cat ZR440 1997 Arctic Cat ZR440 1998 Arctic Cat ZR440 1998 Arctic Cat ZR440 Sno Pro 1999 Arctic Cat ZR440 Sno Pro 2000 Arctic Cat ZR440 Sno Pro 2001 Arctic Cat ZR440 Sno Pro Cross Country 2001 Arctic Cat ZR440 Sno Pro Sno Cross