Davis Unified Ignition (D.U.I.) Ford Racing Distributors offer serious firepower and remains the most popular choice for hot rods, street cars, off-road vehicles and weekend race warriors! Just like D.U.I.'s street/strip series, these distributors are the only one-piece ignition system for Fords and have everything packed into one simple unit, capable of performance up to 10,000 rpm's. No external coils or spark boxes are needed, just one 12 volt hot wire hook up sends 50,000 volts of pure spark energy to the plugs for a cleaner, crisper, more powerful running engine. A special weight and spring assembly is hand fitted and dialed-in for a precise timing curve that will match the specifications of your engine and vehicle. The super smooth advance provides instant throttle response and maximum power throughout the rpm range with no pre-detonation. Recommended for more highly modified engine setups, D.U.I.'s racing distributors deliver quality, reliability and performance that is unmatched.