High-quality flange sets from Athena S.p.A. Head flanges are made of spring steel with a rubber coating. Soft steel main flanges are coated with rubber. Steel-core materials are known for their high strength and excellent tensile resistance. The revolutionary transparent coating ensures a perfect seal even at extremely high temperatures. The blue silicone coating for high temperatures is applied to the most critical flat flanges. The flange sets include all necessary gaskets for restoring the upper and lower parts of the engine, including all rubber seals and O-rings.