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