Search on CAI, K&N etc. on the site and there's enough reading to keep you busy for the rest of the year.
Be warned though, you may be in for som abuse if you start asking questions.
I have a Needwings CAI, as a lot of others do on this formum. Others have the TVT version which is a lot cheaper and I'm sure just as effective as the Needswings. These are both proven designs.
TVT has various intake options available to you.
www.needswings.com
www.tvtdesign.com