TWIN SCOOPS 4" Hole location?

A couple of years ago I added scoops and cut out the 4in holes and fitted rubbers. I cut the holes with a jigsaw and as you can see cut a semi-circle on the bracing. I rust proofed the cut edge and repainted. The finish looks good and plenty of cooling! Without the holes there must be a certain amount of drag with the air going in and no-where to go?

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