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Nice piece of work ericsmc83 which basically confirms what I've been saying for some time now.
Intakes, in general, are not going to produce a whole lot of gain - any company claiming 27 hp should be avoided like the plague.
Any road racer will tell you that it's all about intake air temps. Doesn't matter if your ride has a "tune" or not - unless you're talking about 500+ hp.
However, a "dyno for hire" is not going to have the 80+ mph fans necessary to test ANY air intake system. Dinan and others could prove to be a real resource here (they have those 'wind tunnel' kind of fans).
So where to go from here? IMHO, look at a true CAI system, try to find a dyno test facility with the 'mother of all fans.' AND, be happy with BMW's performance intake claims of +3 hp @ 6000 rpm. IF you can find a system to match or slighly beat that, you're doing about as best you can.
As an added note: notice that the BMW engineers didn't go with a cone or for that matter, a dual-cone setup, but just went with a secondary source of cold air. Unfortunately their CF setup will probably run close to $1K, but maybe the aftermarket guys will come up with something less exotic looking and at a lot lower price.
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