NAMURA TOP END REPAIR KIT. * Top end repair kits include: Pistons, rings, and top end gasket sets. * Namura Pistons have molybdenium/teflon skirt coatings which minimizes resistance and wear and anodized domes which provide superior heat or resistance. * Both of these features help to extend the life span of the pistons. * Rings will fit OEM pistons. * Namura Top End Gasket Sets are precision cut Klingersil coated steel head gaskets for better sealing and high-temp resistance.