A premium gasket made with high temperature silicone. This gasket fits the stock stamped steel side cover used on early BMC "A" series engines. This gasket has been designed with a semi-circular cross section to better fit these side covers. The flat side of the gasket mates to the block, while the curved semi-circular side mates to the recess in the side cover to eliminate leaks. Sold in sets of two, enough for one engine.  PLEASE NOTE - not all "A" series engines have side covers, make sure yours does before you order.