If the ceramic coating has resulted in too tight of a fit for the pipes into the collector and/or the collector into the muffler, an automotive muffler shop can quickly and easily expand each female opening very slightly without any visible indication.
Got some more wiring done, and tested. Had a bit of trouble in the beginning, looking at the factory wire harness diagram trying to copy it. Some wires got hot, luckily the M-Unit no damage, back to the drawing board. The confusion was the fact I was looking at the factory wire harness diagram. Can't say enough about the M-Unit, so simple. Looked at the M-Unit wire diagram and in minute
s moved some wires around and the everything worked headlight, front signals, and dash all work properly together.