Manufactured by SPI Includes 2 pistons, ring sets, wrist pins, bearings, 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 SPI complete gasket kits contain 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 81.00mm Fits 2001 Arctic Cat Mountain Cat 800 Carb 2001 Arctic Cat Mountain Cat 800 LE Carb 2001 Arctic Cat ZL 800 ESR Carb 2001 Arctic Cat ZL 800 ESR Illusion Carb 2001 Arctic Cat ZR 800 Carb 2001 Arctic Cat ZR 800 LE Carb 2002 Arctic Cat Mountain Cat 800 Carb 2002 Arctic Cat Mountain Cat 800 EFI 2002 Arctic Cat Mountain Cat 800 LE Carb 2002 Arctic Cat Mountain Cat 800 LE EFI 2002 Arctic Cat ZL 800 ESR EFI 2002 Arctic Cat ZL 800 SS EFI 2002 Arctic Cat ZR 800 Carb 2002 Arctic Cat ZR 800 Cross Country Carb 2002 Arctic Cat ZR 800 Cross Country EFI 2002 Arctic Cat ZR 800 EFI 2003 Arctic Cat Mountain Cat 800 EFI 2003 Arctic Cat Pantera 800 ESR EFI 2003 Arctic Cat ZL 800 ESR EFI 2003 Arctic Cat ZL 800 SS EFI 2003 Arctic Cat ZR 800 EFI 2003 Arctic Cat ZR 800 Sno Pro EFI 2004 Arctic Cat Mountain Cat 800 EFI 2004 Arctic Cat Pantera 800 EFI