Tired of coolant weaping around the head! This unique gasket has a solid steel core sandwiched by heavy-duty high density gasket material coated with silicone. Additional high temperature silicone bands surround all water passages. Install with no additional sealants! The model 1928-31 model A version is recommended for use with all stock heads. The 1932-34 model B version is recommended with all 1932-34 stock heads as well as 1928-31 model A high compression heads.