Master Power Brakes Legend Series power disc brake conversion kit for 1957-64 Ford F-100 pickup trucks. The Legend Series brake system is cost effective option for upgrading from drum brakes to the reliability and performance of disc brakes. These kits consist of OEM style cast-iron calipers vented rotors and a modern dual master cylinder. Installation is a weekend project that will pay dividends for years to come.Important: Must use a minimum of a 15 wheel. Bolt pattern on the rotor is 5 x 5-1/2.