The exact routing of the factory chassis wiring harness escapes me now but, the reason for the spaghetti farm is that the harness used to run out the drivers side a pillar, across the front under the radiator, and over to the original fuse block mounted on the shock tower. I moved the fuse box behind the glove box. "Phase 1" so to speak, I lengthened the harness and ran it inside the passenger side a pillar. Ultimately the wiring harness did a large loop the whole way around the engine bay and back into the passenger compartment.
I removed the dash to remove the HVAC equipment and decided I would shorten the harness.
At this point, two separate harnesses run inside each fender well to (L/R) headlights/cooling fans etc. MUCH cleaner, much more simple.
The PO of the turbo I know had the compressor cover powder coated, but no mention was ever made of ceramic coating of the hot parts. I would guess that it was factory FP applied.
I will be ceramic coating all my hot parts in black anyway, which is why I never thought much about it.
The downpipe is 3.5" btw.