Davis Unified Ignition (D.U.I.) offers cap and rotor kits with nylon rotor screws that also help prevent voltage from finding a ground through the rotor screws. These nylon screws can also be ...

Davis Unified Ignition (DUI) install In An AMC 304 Four Wheeler's Verne Simons installs a ignition system known as HEI or high energy ignition by Davis Unified Ignition in an AMC 304. Related Videos ...