So looking around at some recent hood scoop shots, it got me to thinking. Style-wise, I think I'd rather have vents or scoops that are sunk into the hood rather than ones protrude up above the line of the hood. I don't know what kind of difference it would make airflow-wise, but I just like the idea of leaving the profile of the hood as smooth and oem looking as possible.

Also, what about rain? Either during driving or just while parked outside. Would a raised scoop be bettter at keeping the water out versus a sunk one? Or do they normally have some sort of door you can close?