Manufactured by SPI Dual ring piston design 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 72.00mm Fits 2004 Ski-Doo GSX 600HO 2004 Ski-Doo GSX 600HO SDI 2005 Ski-Doo GSX 600HO 2005 Ski-Doo GSX 600HO SDI 2006 Ski-Doo GSX 600HO LTD SDI 2006 Ski-Doo GSX 600HO Sport SDI 2007 Ski-Doo GSX 600HO LTD SDI 2007 Ski-Doo GSX 600HO Sport SDI 2008 Ski-Doo GSX 600HO LTD SDI 2008 Ski-Doo GSX 600HO LTD Touring SDI 2009 Ski-Doo GSX 600HO LTD ETEC 2010 Ski-Doo GSX 600HO LE ETEC 2011 Ski-Doo GSX 600HO LE ETEC 2012 Ski-Doo GSX 600HO LE ETEC 2012 Ski-Doo GSX 600HO SE ETEC 2013 Ski-Doo GSX 600HO LE ETEC 2013 Ski-Doo GSX 600HO SE ETEC 2014 Ski-Doo GSX 600HO LE ETEC 2014 Ski-Doo GSX 600HO SE ETEC 2015 Ski-Doo GSX 600HO LE ETEC 2015 Ski-Doo GSX 600HO SE ETEC