'98-'99 Arctic Cat ZL, ZR 600 Stock 78mm Bore Wiseco Piston Kit, Powder SpecialWiseco Stock Standard 78. 00mm Bore Piston Kit. Includes Piston, Rings, Pin, C Clips. 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 XC 1999 Arctic Cat ZR 600 LE Twin Cylinder 2 Stroke Note: