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 70.50mm Fits 1997 2003 Ski-Doo 800 Mach Z / Mach Z LT / Mach Z R / Mach Z LT R / Mach Z Tech Plus 1999 2000 Ski-Doo 800 Formula III 1999 2001 Ski-Doo 800 Grand Touring