FWIW, the "cold air" intakes in the aftermarket do not pull in any colder air than what the stock intake draws. I've measured the intake temps with my Scan Gauge II and found them to be exactly ambient temp. For that reason and the better filtration, I and others have kept it stock.

The intake tubing isn't necessarily restrictive either. Although some may argue that the approx 75° bend after the filter housing isn't "good" for performance. I'd say that it may not be worth 200-300 bucks to straighten out.

That said...they do make a nice sound on acceleration!

There are some pics floating around. I'm sure folks will post and direct you to their galleries.