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 2001 Yamaha Raptor 660 YFM660R 2002 Yamaha Raptor 660 YFM660R 2003 Yamaha Raptor 660 YFM660R 2004 Yamaha Raptor 660 YFM660R 2005 Yamaha Raptor 660 YFM660R