These brackets are CNC machined of high quality billet steel to our rigid standards and specifications, to mount our specially machined large four piston calipers. They're made specifically for the big Lincoln style calipers used with our 12” brakes just like the ones made for Ford’s Trans Am program. They are compatible with Ford spindles that utilize the standard 4 bolt mounting pattern found on 1965-73 drum brake and 1965-67 disc brake Mustang spindles. Comes with all the necessary grade 8 mounting hardware and spacers for proper rotor offset and caliper spacing. Finished in yellow cadmium plating.