Manufactured by Namura Kit includes piston, rings, 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 101.00mm Piston is 100.97mm Made in Taiwan Fits 2002 Yamaha Grizzly 660 4x4 YFM660F 2003 Yamaha Grizzly 660 4x4 YFM660F 2004 Yamaha Grizzly 660 4x4 YFM660F 2004 Yamaha Rhino 660 YXR660F 2005 Yamaha Grizzly 660 4x4 YFM660F 2005 Yamaha Rhino 660 YXR660F 2006 Yamaha Grizzly 660 4x4 YFM660F 2006 Yamaha Rhino 660 YXR660F 2007 Yamaha Grizzly 660 4x4 YFM660F 2007 Yamaha Rhino 660 YXR660F 2008 Yamaha Grizzly 660 4x4 YFM660F