Hi DMZ. :Welcome
Please add your year and trim of your vehicle to your signature line. That way when you start asking questions in other areas of the forum, we all have a better idea on how to assist you. Click on "Quick Links" above, go down to "User Control Panel" and then click on "Edit your Signature" It'* pretty straight forward from there.
As far as the CAI, you have two options a 1) fender well kit or 2) CAI box. I went with a Thrasher Thrasher Cold AirIntake on Flickr - Photo Sharing!
Danthurs built his own CAI box that replicates the Thrasher box, which draws the cold air from the filter box intake area on the front clip.