CNC machined from aluminum with the proper 1.59” offset for compatibility with our caliper and caliper mounting brackets. These hats can be used with stock cast iron 1965-67 Mustang disc brake hubs or our own billet disc brake hubs for easy “slide-on/slide-off” rotor removal. Buy these hats once and then simply replace only the rotors when needed for cost reducing efficiency. Makes rotor replacement on the vehicle a snap. Designed with a common 8 on 7” rotor bolt pattern, these must be used with our racing rotors. Aluminum finish (for standard Ford 5 on 4-1/2” wheel stud pattern).