Manufactured by Kit includes piston, rings, pin, clips, wrist pin bearing 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 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 – 45.00mm Size C piston is 44.98mm Compatible with KTM models below: 1998 65 SX 1999 65 SX 2000 65 SX 2001 65 SX 2002 65 SX 2003 65 SX 2004 65 SX 2005 65 SX 2006 65 SX 2007 65 SX 2008 65 SX 2008 65 XC