Hellwig 78-88 GM A/G-Body Tubular 1in Rear Sway BarTubular 1 rear sway bar. Hellwig Sway Bars tighten up body roll so you benefit from better vehicle control, greatly improved traction for safer driving and faster cornering. This Part Fits: Year Make Model Submodel 1980 1981 Buick Century Base 1978 1979 Buick Century Custom 1980 1981 Buick Century Estate 1978 1981 Buick Century Limited 1978 1979 Buick Century Special 1978 1981 Buick Century Sport 1978 1987 Buick Regal Base 1988 Buick Regal Custom 1982