COMP Cams Magnum Double Row Timing Set CheFeaturing an induction hardened cast iron cam gear with a billet crank gear, this Magnum timing set has a heavy duty, heat treated double row chain for mild street performance '78 '86 Chevrolet V6 and '55 '91 Chevrolet 265 400 Small Block. Catalog User 1 This Part Fits: Year Make Model Submodel 1980 Buick Century Base 1980 Buick Century Estate 1980 Buick Century Limited 1991 Buick Commercial Chassis Base 1980 Buick Regal Base 1980 Buick Regal Limited