DUI Distributor, manufactured by Performance Distributors, refers to the Davis Unified Ignition brand of performance ignition systems. These distributors are known for their one-piece design, incorporating a high-voltage coil and a high-dwell Dyna-Module within the distributor body, simplifying installation and enhancing performance. DUI distributors are designed to deliver a more powerful spark, allowing for wider spark plug gaps and improved combustion, resulting in increased horsepower and torque.