Machined smooth heads. MOS 2 Coating:. Draws heat through piston walls and out the bottom. Reduces heat and friction, for added power and longevity. Helps eliminate cold seizures, and increases durability. Hard anodized crowns. Hypereutectic Cast.

1990 fits Ski-Doo fits Alpine 508
1991 fits Ski-Doo fits Alpine II
1993-1995 fits Ski-Doo fits Alpine II
1979-1981 fits Ski-Doo Blizzard 7500 Plus
1980-1984 fits Ski-Doo Citation 3500
1985-1988 fits Ski-Doo Citation LS
1985-1988 fits Ski-Doo Citation LSE
1981-1983 fits Ski-Doo Everest L/C
2002 fits Ski-Doo Grand Touring 500 Fan
2001-2002 fits Ski-Doo MX Z 500 Fan
1989-1990 fits Ski-Doo Safari Chyenne
1989 fits Ski-Doo Safari Escapade
1993 fits Ski-Doo Safari Rally
1994 fits Ski-Doo Safari Rally E
1989 fits Ski-Doo Safari Voyageur
1996-2000 fits Ski-Doo Skandic 500
1997-2003 fits Ski-Doo Skandic 500 SWT
1996-2003 fits Ski-Doo Skandic 500 WT
1987 fits Ski-Doo Skandic 503
1993-1994 fits Ski-Doo Skandic II
1993-1994 fits Ski-Doo Skandic II 503R
1993-1994 fits Ski-Doo Skandic II 503R SLT
2001-2002 fits Ski-Doo Summit 500 Fan
1989-1993 fits Ski-Doo Tundra
1987 fits Ski-Doo Tundra LT
1989-1993 fits Ski-Doo Tundra LT