This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Buick Century: 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992] - [Buick Skylark: 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991] - [Buick Somerset Regal: 1985] - [Buick Somerset: 1986, 1987] - [Chevrolet Camaro: 1982, 1983, 1984, 1985, 1986] - [Chevrolet Celebrity: 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990] - [Chevrolet Citation II: 1984, 1985] - [Chevrolet Citation: 1980, 1981, 1982, 1983] - [Chevrolet Lumina: 1990, 1991, 1992] - [Chevrolet Monza: 1980]