This disc brake conversion uses 11-3/4" x 1.25 thick rotors and Wilwoods 4-piston Narrow Mount Dynalite Caliper. Mounts directly to Dodge, Chrysler, Plymouth B or E- body drum brake spindles Dodge Chrysler, and Plymouth cars and uses Narrow Mt. Dynalite Caliper. Mounts on stock drum spindles and uses 11-3/4" diameter rotors. Includes bearings, seals, wheel studs, mounting brackets, rotor adapters, and hubs. Other options include larger four piston Superlite or six piston Superlite calipers, light weight master cylinder, proprtioning valve, and residual valve.