Manufactured by Namura 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 Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Namura gaskets use performance materials to increase durability and provide greater reliability Includes all gaskets pictured to rebuild top end Kit is for .040 over bore size 73.00mm Piston is 72.96mm Made in Taiwan Fits 1985 Polaris Trail Boss 250 2x4 1986 Polaris Trail Boss 250 2x4 1987 Polaris Trail Boss 250 2x4 1987 Polaris Trail Boss 250 4x4 1988 Polaris Trail Boss 250 2x4 1988 Polaris Trail Boss 250 4x4 1989 Polaris Big Boss 250 4x6 1989 Polaris Trail Boss 250 2x4 1989 Polaris Trail Boss 250 4x4 1990 Polaris Big Boss 250 4x6 1990 Polaris Trail Blazer 250 1990 Polaris Trail Boss 250 2x4 1990 Polaris Trail Boss 250 4x4 1991 Polaris Big Boss 250 4x6 1991 Polaris Big Boss 250 6x6 1991 Polaris Trail Blazer 250 1991 Polaris Trail Boss 250 2x4 1991 Polaris Trail Boss 250 4x4 1992 Polaris Big Boss 250 4x6 1992 Polaris Big Boss 250 6x6 1992 Polaris Trail Blazer 250 1992 Polaris Trail Boss 250 2x4 1992 Polaris Trail Boss 250 4x4 1993 Polaris 250 2x4 1993 Polaris 250 4x4 1993 Polaris 250 6x6 1993 Polaris Trail Blazer 250 1994 Polaris Trail Blazer 250 1994 Polaris Trail Boss 250 1995 Polaris Trail Blazer 250 1995 Polaris Trail Boss 250 1996 Polaris Trail Blazer 250 1996 Polaris Trail Boss 250 1997 Polaris Trail Blazer 250 1997 Polaris Trail Boss 250 1998 Polaris Trail Blazer 250 1998 Polaris Trail Boss 250 1999 Polaris Trail Blazer 250 1999 Polaris Trail Boss 250 2000 Polaris Trail Blazer 250 2000 Polaris Xplorer 250 4x4 2001 Polaris Trail Blazer 250 2001 Polaris Xplorer 250 4x4 2002 Polaris Trail Blazer 250 2002 Polaris Xplorer 250 4x4 2003 Polaris Trail Blazer 250 2004 Polaris Trail Blazer 250 2005 Polaris Trail Blazer 250 2006 Polaris Trail Blazer 250