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 2006 Ski-Doo GTX 600HO LTD SDI 2006 Ski-Doo GTX 600HO Sport SDI 2007 Ski-Doo GTX 600HO LTD SDI 2007 Ski-Doo GTX 600HO Sport SDI 2008 Ski-Doo GTX 600HO LTD SDI 2008 Ski-Doo GTX 600HO Sport SDI 2009 Ski-Doo GTX 600HO LE ETEC