This may sound crazy, but what if you attached a grille shield to that metal bar, and it blocked air from going into the grille, but did not seal it?
I don't know if that would allow air to still circulate while reducing air going in- not as hot, and not as much drag. I don't imagine it would create more frontal area or increase drag- but I'm sure a more educated individual can chime in on that idea.
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