COMP Cams Magnum Double Row Timing Set CadThis Magnum Roller Timing Set features a induction hardened cast iron Camshaft Gear and billet Steel crank sprocket. A 3 keyway crank sprocket offers 4 degree incremental adjustability, 4 degree maximum advance retard. Heavy duty, heat treated double row timing chain is durable enough to withstand aftermarket components Catalog User 1 This Part Fits: Year Make Model Submodel 1968 1976 Cadillac Calais Base 1968 1979 Cadillac Commercial Chassis Base