Manufactured by SPI Includes 2 pistons, ring sets, wrist pins, circlips full gasket kit 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 Contains all gaskets pictured to rebuild an engine, including oil seals with stainless steel springs for maximum performance and corrosion resistance. Made in Taiwan Pistons are for standard bore size 83.00mm Fits 2005 Polaris 900 Fusion 2005 Polaris 900 RMK 151 2005 Polaris 900 RMK 159 2005 Polaris 900 RMK 166 2005 Polaris 900 Switchback 2006 Polaris 900 Fusion 2006 Polaris 900 RMK 151 2006 Polaris 900 RMK 159 2006 Polaris 900 RMK 166 2006 Polaris 900 RMK 166 Dragon 2006 Polaris 900 Switchback