This front 13" big brake power disc brake conversion kit has almost everything needed to add modern big brakes to your classic 58-64 fullsize Chevy. Featuring13”, gas slotted, and zinc washed rotors mounted to 2024 T6 billet aluminum CNC machined anodized hubs, this kit uses PBR C15 calipers that attach to the spindles with CPP custom caliper mounting brackets.