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 73.80mm Fits 2005 Arctic Cat M6 EFI 2006 Arctic Cat M6 EFI 2007 Arctic Cat M6 EFI 2008 Arctic Cat M6 EFI 2009 Arctic Cat M6 EFI 2010 Arctic Cat M6 EFI 2011 Arctic Cat M6 EFI