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 71.00mm Fits 1998 Arctic Cat ZL 500 L/C carb 1998 Arctic Cat ZR 500 L/C carb 1999 Arctic Cat Powder Special 500 L/C EFI 1999 Arctic Cat ZL 500 L/C carb 1999 Arctic Cat ZL 500 L/C EFI 1999 Arctic Cat ZR 500 L/C carb 1999 Arctic Cat ZR 500 L/C EFI 1999 Arctic Cat ZR 500 L/C LE carb 1999 Arctic Cat ZR 500 L/C LE EFI 2000 Arctic Cat Powder Special 500 EFI 2000 Arctic Cat Powder Special 500 LE EFI 2000 Arctic Cat ZL 500 carb 2000 Arctic Cat ZL 500 EFI 2000 Arctic Cat ZR 500 carb 2000 Arctic Cat ZR 500 EFI ***Pistons are for A case motors and have 20mm wrist pins***