MSD Wiring Harness - MSD 6 to GM Dual Connector Coil Shifters & Components 1967-1974 Mercury Marquis

1967-1974 Mercury Marquis

and built for a lifetime of non-stop abuse

During development

Bigger power gains

MSD Wiring Harness - MSD 6 to GM Dual Connector Coil Shifters & Components 1967-1974 Mercury MarquisMSD Ignition Controls are easy to install, but we also offer several plug in Harnesses. These are especially handy for quick installation on late model vehicles! The Harnesses plug directly into your factory coil and harness then four color coded wires plug into the corresponding wires of the MSD. Two wires go from the MSD to the battery and you're done with no cutting or splicing! The harnesses plug directly into your factory coil and harness then