The MSD DIS Ignition Controls are popular additions to GM DIS vehicles and these products make installation even easier!

Coil Interface Module
This module mounts between the factory GM ignition module and coil packs. Color coded wires connect to the DIS wiring. Connects directly to the factory terminals.

Buick Interface Module & Harness
Designed for the large one piece coil unit used on Buick's T-Types and Grand National V6 engines. The Interface mounts between the factory ignition module and coil housing then wires easily to the MSD DIS-4 Ignition Control.