Fel-Pro 1404 Exhaust Manifold Gasket Set Features: Not intended for use in emission controlled vehicles. Anti-stick coating permits motion without damaging the gasket and makes it easier to remove the gasket for future engine service. Slotted bolt holes allow for easier header installation. Resists blowout and burnout from high-temperature exhaust and is far stronger than basic paper gaskets. Performance exhaust header gasket consisting of a high-density fibre facing material attached to both sides of a perforated steel core. Specification: Material: Perforated Steel Core with Anti-Stick Coating Port Shape: Square Applications: Buick 1973-1975 Apollo 1973-1973 Centurion 1973-1981 Century 1991-1996 Commercial Chassis 1977-1987 Electra And various other models Chevrolet 1968-1975 Bel Air 1968-1972 Biscayne 1970-1994 Blazer 1975-1985 C10 1968-1973 C10 Pickup And various other models GMC 1975-1978 C15 1975-1978 C15 Suburban 1968-1973 C15/C1500 Pickup 1968-1973 C15/C1500 Suburban 1979-1999 C1500 And various other models Pontiac 1977-1986 Bonneville 1976-1981 Catalina 1975-1996 Firebird 1979-1980 Grand Am 1981-1981 Grand LeMans And various other models