I know there have been numerous discussions on this in the past between those that chopped their coweling up, swapped to M3, or removed it all together. I can't find it, so I am putting this here. The portion of the video discussing the pressure zones and direction of airflow through the engine bay start around 7:00-7:30. Great watch overall and recommend it to everyone interested in modding.
@doublespaces please fix if not done correctly, but be gentle, it's my first time.