This is a fun read!
Well if anyone is interested we did a test with the Stock Airbox compared to our Helix Intake on the same day, same car. I didnt do a DCI vs Helix intake Dyno but maybe if someone else can find a stock vs dci Dyno we could see. Also, get it from a good source, some intakes claim 25 hp which we all know is bologna. The test we did was not in a wind tunnel so there is no way to get an exact delta. We did what we could with the tools we have. The Intake is past its testing period so PM me with any questions.
Heres my thread with the dyno:
http://www.e90post.com/forums/showthread.php?t=621269