ZZ Crate Engine D.U.I.’s
Our Street/Strip Chevrolet DUI Distributor is now available for the popular ZZ series crate engines! This new DUI (Davis
Unified Ignition) is designed for the ZZ-4, ZZ-454 and ZZ
502. A special timing curve and a melonized gear sets this distributor apart from our standard DUI. The advance weights and springs are tuned specifically for these crate engines. The optimized curve provides instant throttle response and maximum performance all through the RPM range without any predetonation. The melonized gear is installed for proper meshing with the roller cam.