Manufactured by Kit includes piston, rings, bearing, pin, clips, top end gasket kit (you get exactly what is pictured) Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenum Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan gaskets use performance materials to increase durability and provide greater reliability Includes all gaskets pictured to rebuild top end Kit is for standard bore size – 72.00mm Piston is 71.96mm Compatible with Polaris models below: 1985 Trail Boss 250 2×4 1986 Trail Boss 250 2×4 1987 Trail Boss 250 2×4 1987 Trail Boss 250 4×4 1988 Trail Boss 250 2×4 1988 Trail Boss 250 4×4 1989 Big Boss 250 4×6 1989 Trail Boss 250 2×4 1989 Trail Boss 250 4×4 1990 Big Boss 250 4×6 1990 Trail Blazer 250 1990 Trail Boss 250 2×4 1990 Trail Boss 250 4×4 1991 Big Boss 250 4×6 1991 Big Boss 250 6×6 1991 Trail Blazer 250 1991 Trail Boss 250 2×4 1991 Trail Boss 250 4×4 1992 Big Boss 250 4×6 1992 Big Boss 250 6×6 1992 Trail Blazer 250 1992 Trail Boss 250 2×4 1992 Trail Boss 250 4×4 1993 250 2×4 1993 250 4×4 1993 250 6×6 1993 Trail Blazer 250 1994 Trail Blazer 250 1994 Trail Boss 250 1995 Trail Blazer 250 1995 Trail Boss 250 1996 Trail Blazer 250 1996 Trail Boss 250 1997 Trail Blazer 250 1997 Trail Boss 250 1998 Trail Blazer 250 1998 Trail Boss 250 1999 Trail Blazer 250 1999 Trail Boss 250 2000 Trail Blazer 250 2000 Xplorer 250 4×4 2001 Trail Blazer 250 2001 Xplorer 250 4×4 2002 Trail Blazer 250 2002 Xplorer 250 4×4 2003 Trail Blazer 250 2004 Trail Blazer 250 2005 Trail Blazer 250 2006 Trail Blazer 250