Even with the steeply raked windshield found on the 8th Gen Civic, Honda, like all manufacturers, knows that this is the best place to draw in fresh air as the pressure is relatively high here. Rather than just utilizing the air for the ventilation system, I would kill two birds with one stone by picking up that same air to be ingested into the intake. Since the area is a high pressure zone, the air velocity will be greater, thus giving a ram effect.
