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@ThermalColt29 I just got it to work today, I've done this mod in the past without issue, they must have updated the penumbra.

All you need to do is search penumbra in open IV to find where the car files go (its in the update folder many layers down) and then search for one of the mods (like the bumper) to find the vehicle mods folder where all the penumbra mods now belong (also under the update main folder)

Hope this helps someone!