Speedway Rear Disc Brake Conversion Kit, fits 1955-64 Chevy Full-Size
Complete Rear Disc Brake Conversion Kit Includes: 11 GM Rotors Multi Pattern. Fits 5x4.75" w/ 7/16 Studs & 5x4.5" w/ 1/2 Studs. Large GM Calipers w/ Self Adjusting E-Brake (1979 Cadillac El Dorado) D54 Pads Included. Tech Notes: Does not fit S-10 Chassis or truck frames.
Maximum diameter of 6.11 to fit rotor hat. Rotor Center = 2-3/4" - Rotor Hat Section Inside Diameter = 6-1/8" You will need to modify your axles if they will not fit inside the rotor hat and you will need to modify the rotor if the center hole is too small for your axles. 2.786 max register axle.