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 82.00mm ***Pistons are dual ring design, single ring pistons also available*** Fits 2004 Ski-Doo GSX 800HO 2005 Ski-Doo GSX 800HO 2006 Ski-Doo GSX 800HO LTD PTEK 2007 Ski-Doo GSX 800HO LTD PTEK