Here are different systems described which make their owners obviously happy, and the cars seem to work well under everyday circumstances.
Otherwise this is an interesting discussion, also on a technical level.
Ok, taking into account the explanation regarding too much hot air under the bonnet reaching open filter systems I'm wondering if the (hopefully) warm air protecting enclosure of the Rapid Engineering system allows to get a sufficient amount of cold air from outside via the side louvres. And if so, the question could arise if the filter will get this cold air from all around...if that matters.
