@MHS I've talked with SunBro regarding the glowing exhausts problem, and what he had was another issue related to an old ext_config (packed in a 3rd party endurance lights mod for GTs) conflict that shouldn't even be affecting this car.
After some detective work: For the red thing under, I don't this is a CSP issue, it's most probably related to the
IROC skin pack (the hint were plain cars with different colors but same detail on the bumper + bright red stripes, which doesn't seem related to the orange glow effect) and the way they end up mapped on the lowest lods, in addition to the chance of the user having csp tweaks to show lower detailed lods closer than default + narrow fov. Just looking at them, those skins have red stripes painted over unsafe zones, which seem to align with the affected area, and miss a black background unlike the one found on other submitted skins.
@Billy Pilgrim please test again with the original skins, or similar ones with the same general appearance on the dds file.