Copper Pre-Flattened O-Ring Head GasketSuit SB Ford 289-351W 1983-95, 4.100" Bore, .039" Compressed ThicknessBrand: FELPROPart Number: FE1011-2Description: These Fel-Pro wire ring head gaskets feature the same race winning construction as our steel o-ring gaskets but with a pre-flattened copper combustion seal to prevent brinelling of aluminium cylinder heads.