'98-'99 Arctic Cat ZL ZR 600 Standard, Stock 78mm Bore Piston Kits Powder SpecialProX Standard Stock 78. 00mm Bore Piston Kits Includes (2) Pistons, (2) Sets of Rings, (2) Pins, (2) Pairs of C Clips and (2) Top End Bearings ITEM FITS: 1998 1999 Arctic Cat Powder Special 600 1998 1999 Arctic Cat Powder Special 600 EFI 1998 1999 Arctic Cat Powder Special 600 EFI LE 1999 Arctic Cat ZL 600 1999 Arctic Cat ZL 600 EFI 1999 Arctic Cat ZR 600 1998 1999 Arctic Cat ZR 600 EFI 1998 1999 Arctic Cat ZR 600 EFI LE 1998 Arctic Cat ZR 600 EFI LE