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 73.00mm Fits 2014 Polaris 550 Indy 2014 Polaris 550 Indy 144 2014 Polaris 550 Indy Adventure 144 2014 Polaris 550 Indy LXT 2014 Polaris 550 Indy Voyager 2015 Polaris 550 Indy 2015 Polaris 550 Indy 144 2015 Polaris 550 Indy Adventure 144 2015 Polaris 550 Indy Adventure 155 2015 Polaris 550 Indy LXT 144 2015 Polaris 550 Indy Voyageur 144 2015 Polaris 550 Indy Voyageur 155