O.K.......this might just be the painkillers that I'm on doing the thinking for me (fractured rib :o )but, Do you think it is possible for the cold air coming into my C.A.I. to be too cold, and potentially bad for my engine? I live in Chicago, and the temp already got down into the teens here last night....and just gets worse until March or so. I was thinking about switching my intake back to stock for the winter, but don't know if it would really be necessary.
Hmmmmmm.......:wary What do you think?

Leave it on. The differences in the temperature of the air being taken in by a short ram versus that of a CAI are negligible in the winter months.

my car is quite a bit quicker now that its cool out.

Im in chicago too and I remove the CAI extension, not because its too cold (I dont think you can have intake air thats too cold) but I remove it because snow will usually fill the front bumper of mine and I dont want it to freeze all around the filter etc.. My car is like a snow plow in the winter and I collect lost o snow in the front grill

tha colder tha better....thats for every thing air,feul and water if ya got antifreeze....