These MSD 6-Hemi ignition controllers fire the coils and control the timing on Hemis that are retro-fit with a carburetor or late model factory electronic fuel injection. You program two separate rev limits and have a single-step retard adjustment. The MSD 6-Hemi ignition controllers connect easily, directly to the coils, crankshaft, cam, and MAP sensors for a simple installation. Wiring harnesses for installing on factory EFI engines are sold separately. Product Features:Fires Coils and Controls Timing on Hemis Retro-TitProgram two rev limits and a step retardCan be used w/Carburetor or factory EFIEasily connects directly to coils/crank/cam/MAP sensors
