Graphite engine head gasket for Sportster Evolution 883cc all years. Use with #60914 O rings. The graphite head gaskets or OEM style are manufactured using a .008 inch electrolytic tin plate steel core. The core is then laminated on both sides with an expanded graphite facing. The fiber covers are then mechanically bonded without the use of any adhesives. This type of mechanical bonding ensures product integrity at high temperatures. The material has excellent sealability over extended periods of time and temperature ranges. Manufacturer