Features a dual 5 on 4.5″/4.75″ bolt pattern, Forged billet FDL four piston calipers mount directly to the spindle with a bolt-on bracket, Five lug hubs with direct mount steel rotors combine to provide an average weight savings of over 30 pounds compared to stock drum or disc brakes, 10.75″ rotor is designed to fit 15″-up wheels, Designed to fit various 1937-1949 Fords.