I was thinking the real vent would have the same shape as the existing vent - so probably no change in wind resistance. Also the vent slats would be angled so that the vent openings would be towards the windshield, so hopefully not taking in too much additional dust. Kinda the same design as it now is, but just metal.
I can understand that the design team wanted to preserve the look of the Hummer hood. I just wish they had made that "vent" out of metal.
As you can tell, I like metal. More metal.
