Cometic GM Dart/Brodix Small Block V8 .044in MLX Cyl Head Gasket-4.310in Bore-4.500in Bore CenterThe HP shim technology increases clampload around the combustion chamber, thereby increasing the sealability of the head gasket around the open deck block. This Part Fits: Year Make Model Submodel 1980 1985 Avanti II Base 1985 Avanti II GT 1980 1981 Buick Century Base 1980 Buick Century Estate 1980 1981 Buick Century Limited 1982 Buick LeSabre Custom 1982 Buick LeSabre Limited 1980 1986 Buick Regal Base 1982 1983 Buick Regal Estate Wagon 1980