DUI IGNITIONS- High Performance and Racing Ignition. Our Racing D.U.I. Distributor is capable of turning 9000 RPM's. That's almost double the output of a stock H.E.I.! Years of engineering experience and modern technology allowed us to develop a high voltage coil and high dwell module that would turn the high rev's needed for today's racing engines. No external spark boxes or coils are needed as our race coil and module fit inside the distributor for an easy drop-in installation with a one wire hookup. This is the only magnetically triggered, self-contained (internal coil and module) distributor available that will spin 9000 RPM's!