AveoNetwork.com Archive -- on AveoForum.com

I found a comparison of a bunch of aftermarket air filters, so I figured I would share. They weren't tested on an aveo (which is pretty obvious from the hp gains!) but it gives a good idea on filtration.
http://www.mkiv.com/techarticles/filters_test/2/

I never did a CAI on mine. I just went with a drop in K&N. Been happy so far.