All gaskets meet or exceed OEM qualityComposite head gaskets include a steel core and a state-of-the-art facing material, featuring a patented transparent coating, to improve the sealing property and prevent corrosionMetal head gaskets are made of stainless steel, featuring a patented thermoplastic coating, to help compensate for all possible micro-imperfections of the engine surfaces.Our fiber gaskets are made from materials providing the best mechanical and tensile strength resistanceGaskets come with anti-stick silicon beading (where applicable)