Included is two piston kits pistons, rings, circlips and wrist pins Manufactured by SPI T-Moly series pistons feature silicone aluminum alloy construction with teflon and molybdenum coating and a hard anodized crown Manufactured to OEM Specifications All kits are interchangeable with OEM components Works in both cast and chrome cylinders Pistons are for standard bore size 85.00mm Made in Taiwan Fits 2000 Polaris 800 RMK 2001 Polaris 800 RMK 144 2001 Polaris 800 RMK 151 2001 Polaris 800 RMK SP 144 2001 Polaris 800 RMK SP 151 2002 Polaris 800 RMK 144 F/O 2002 Polaris 800 RMK 144 F/O Stock 2002 Polaris 800 RMK 151 F/O 2002 Polaris 800 RMK 151 F/O Stock 2002 Polaris 800 RMK 156 F/O 2003 Polaris 800 RMK 144 F/O 2003 Polaris 800 RMK 144 Stock 2003 Polaris 800 RMK 151 F/O 2003 Polaris 800 RMK 151 Stock 2003 Polaris 800 RMK 159 F/O 2003 Polaris 800 RMK 159 Vertical Escape 2004 Polaris 800 RMK 2005 Polaris 800 RMK