A premium valve cover gasket made with high temperature silicone. This gasket fits the popular aftermarket Aluminum Alloy valve cover available for the BMC "B" series engines (1489cc, 1588cc, 1622cc, 1789cc). This includes the MGA, MGB, and other cars fitted with this engine. This gasket has been patterned directly from an Alloy valve cover. The radius of the corners of this gasket will match the alloy cover perfectly, unlike a stock gasket. The cross-section of this gasket is rectangular to suit the sealing surface of the alloy valve cover.