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 .010 bore size 70.75mm Fits 1999 Polaris 500 XC 1999 Polaris 500 XC SP 2000 Polaris 500 RMK 2000 Polaris 500 XC 2000 Polaris 500 XC SP 2001 Polaris 500 RMK 136 2001 Polaris 500 XC 2001 Polaris 500 XC SP 2002 Polaris 500 RMK 136 2002 Polaris 500 XC 2002 Polaris 500 XC SP 2002 Polaris 500 XC SP F/O 2002 Polaris 500 XC SP M-10 F/O 2003 Polaris 500 Classic 2003 Polaris 500 XC Edge F/O 2003 Polaris 500 XC SP Edge 2003 Polaris 500 XC SP Edge M-10 F/O 2003 Polaris 500 XC SP Edge X F/O 2004 Polaris 500 XC SP Edge 2004 Polaris 500 XC SP M-10 2005 Polaris 500 XC SP Edge 2005 Polaris 500 XC SP M-10 2006 Polaris 500 XC SP Edge 2007 Polaris 500 XC SP