I've saw this on a website when I was doing research for a cheap CAI. The only 2 ways to do it cheaply were the Poormans way, and the CP Racing Motorsports intake on ebay. Thats what I did. Its cheap, and its so damn close to the AEM that I'm surprised they haven't been sued for it.

Its one of the only single piece CAI setup on ebay other than AEM and Iceman. And its DOT approved. It fit like a charm with no mods needed.

Also on the 7th Gen Civic, there was an article/dyno run for a AEM CAI, Short ram, and Stock. The best was the CAI, while the short ram was actually worse than Stock. This was blamed on early designs.