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 77.25mm Fits 2007 Polaris 600 HO Switchback CFI 2008 Polaris 600 Dragon IQ CFI 2008 Polaris 600 Dragon Switchback CFI 2008 Polaris 600 Switchback CFI 2009 Polaris 600 Dragon Switchback CFI 2009 Polaris 600 Switchback CFI 2010 Polaris 600 Dragon Switchback CFI 2010 Polaris 600 Switchback CFI 2011 Polaris 600 Switchback CFI