MSD Digital 6AL-2 CD Ignition Control Box (IGN MSD 6421)
Msd Digital 6AL-2 Ignition Control Module- Built-In 2 Step Rev Control - RPM Limit Accepts Hall-Effect - Points And Mag Pickup Triggers - 4 - 6 - 8 Cylinder Engines - MSD Ignitions
NOTE: Twin Plug Wiring Layout Diagram (PDF Download)
Alternate Part Numbers: IGN MSD 6421 / IGN-MSD-6421 / IGN.MSD.6421 / IGNMSD6421