Thought I'd chime in about something that was brought up now that the discussion has been started.
First off I'd like to thank the community for all the help thus far in testing out the intakes, without a great community most of this would not be possible.
Now to to the data...BigMoneyCloser had done the initial dyno using a Mustang dyno and back to back there was a significant gain with the MDesign over the Air Raid (10.6whp & 16wtq) though as we can see in this test the MDesign and Air Raid were pretty close. The only difference between the mods of both peppelepugh and BigMoneyCloser are the addition of downpipes and catback exhaust.
The intake is a breather mod, along with anything that involves changing the intake/exhaust systems. As such, the combination of other intake/exhaust modifications can have a affect on how well the added performance parts compliment each other as a whole which is what had occurred in BigMoneyCloser's testing. With the downpipes and catback installed, being the only difference as both vehicles have 3Bar tune and intake, the same tests showed a gain when swapping the Air Raid for the MDesign. As suggested above, the best method of testing the intakes for "quickness" or speed would be at the track which I plan to do when the weather/tracks open up here in Michigan.