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 .010 over bore size 76.25mm Made in Taiwan Fits: 1994 - 1998 Ski-Doo Summit 583 1996 - 1998 Ski-Doo MXZ 583 1993 - 1994 Ski-Doo Grand Touring 582 1994 Ski-Doo Grand Touring 582 XTC 1995 - 1996 Ski-Doo Grand Touring 580 1997 - 1999 Ski-Doo Grand Touring 583 1994 - 1999 Ski-Doo Formula Z 583 1998 - 1999 Ski-Doo Formula Deluxe 583 1994 - 1996 Ski-Doo Formula STX 1994 Ski-Doo Formula STX II 1995 - 1996 Ski-Doo Formula STX LT 1992 - 1993 Ski-Doo Formula Plus 1992 - 1993 Ski-Doo Formula Plus XTC 1993 Ski-Doo Formula Plus EFI 1993 Ski-Doo Formula Plus 2 1993 Ski-Doo Formula Plus E 1989 - 1992 Ski-Doo Formula Mach I 1991 - 1992 Ski-Doo Formula Mach I XTC