For 1957 please specify if for an Eldorado Brougham.
We carry an authentic, licensed reproduction of the "Radio/GM" spark plug wires as used circa 1949-1965. This is a complete kit including coil wire, hardware, and instructions. All original type GM/Packard lettering. We've added date coded and pre-fit kits for 1954-1962. Also 1961-1972 "date coded" and refitted. Please know your car's assembly date. (Wires were not dated prior to 1961.)