SPI T-Moly series pistons feature Manufactured by SPI Pistons are for standard bore size 73.80mm SPI pistons are engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls All pistons, rings, pins and circlips are manufactured to OEM specifications All individual components are interchangeable with original parts Piston weight compatible with original piston Made in Taiwan T-Moly series pistons additional benefits Machined smooth heads MOS2 Teflon-molybdenum coating Hard anodized crowns Hypereutectic cast Fits the following models 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