this is a bit hard to explain but my mate had smooth bonnet, looked hte dogs but he expected over-heating issues so what he did was (not sure how), mount a large diameter flex-pipe with which he put one end behind the lower grill on the bumper (you couldn't see it) and the other end going somewhere near his induction kit not 100% sure where but what it did was allow cool air to go through the pipe and allowed his induction kit to use it =D pretty good idea but sounds very fiddly