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 69.50mm Fits: 1993 Ski-Doo Formula Mach Z 780 1994 Ski-Doo Formula Mach Z 780 1995 Ski-Doo Formula Mach Z 780 1996 Ski-Doo Mach Z 780 1996 Ski-Doo Mach Z 780 LT