The purpose of this mod is to allow the underbody airflow to hit the front of the oilpan, and carry away some of the heat in the oil. The mod was found on a video where Garage Fukui (Phoenix Power) quickly outlined it at their shop. Thanks go out to Shane Craddock for showing the mod on his car, and saving all the parts.
Cut off a piece of the underbody plastic in this shape.
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