There is a guy out here who converted a Civic's (I think Civic) CAI to a 2.3 and said it wasn't to bad, you can run a search probly and find it.
Here is a link that helped me make my CAI its pretty cool. I only noticed high end RPMS when I added it though, but no hp.
http://jman.stangnet.com/coldair.htm
Also here is a few of my pics and one shows part of my CAI on my 93' N/A. I cheated and use a lot of Auto Zone stuff like the MAF adptor for a mazda which fit great. I just bought some gasket material to make a gasket for it and the ACT sensor that you can see mounted on top of the PVC elbow. The
K&N is inside the fender and can't see it.
http://www.amwlawncare.com/wastedspace/peoples/rayslocks.htm
I hope this helps a little.