Gm Late Model Hei V8 Ext Coil Distributor- Black Drop-In Replacement Distributor- Black For Late Model GM Hei Distributors With Exterior Coil MSD IgnitionA factory style ignition module is supplied with the distributor so your factory wiring will plug directly in. Triggering this module is the responsibility of a high output magnetic pick up. Topping it all off is a heavy duty rotor and a red MSD cap with brass terminals to ensure full spark delivery. For late model engine swaps or bolt on strength, this distributor is the answer. GM late model performance enthusiasts will be happy to see this Pro