Manufactured by SPI Includes 2 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 65.00mm Fits 1999 Ski-Doo MXZX 440 Liquid Cooled 453cc engine 2000 Ski-Doo MXZX 440 Liquid Cooled 453cc engine 2001 Ski-Doo MXZX 440 Liquid Cooled 453cc engine 2002 Ski-Doo MXZX 440 Liquid Cooled 453cc engine 2003 Ski-Doo MXZX 440 Liquid Cooled 453cc engine 2004 Ski-Doo MXZX 440 Racing Liquid Cooled 453cc engine 2005 Ski-Doo MXZX 440 Racing Liquid Cooled 453cc engine 2006 Ski-Doo MXZX 440 Racing Liquid Cooled 453cc engine 2007 Ski-Doo MXZX 440 Racing Liquid Cooled 453cc engine