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 72.00mm Pistons are single ring design, dual ring design for same models also available Fits 2005 Ski-Doo Expedition 600HO SDI 2006 Ski-Doo Expedition 600HO TUV SDI 2007 Ski-Doo Expedition 600HO TUV SDI 2008 Ski-Doo Expedition 600HO TUV SDI 2009 Ski-Doo Expedition 600HO TUV SDI 2010 Ski-Doo Expedition 600HO TUV SDI 2010 Ski-Doo Expedition 600HO TUV SDI SE 2011 Ski-Doo Expedition 600HO LE ETEC 2011 Ski-Doo Expedition 600HO SE ETEC 2012 Ski-Doo Expedition 600HO LE ETEC 2012 Ski-Doo Expedition 600HO SE ETEC 2013 Ski-Doo Expedition 600HO LE ETEC 2013 Ski-Doo Expedition 600HO SE ETEC 2014 Ski-Doo Expedition 600HO LE ETEC 2014 Ski-Doo Expedition 600HO SE ETEC 2015 Ski-Doo Expedition 600HO LE ETEC 2015 Ski-Doo Expedition 600HO SE ETEC