CAI Stock on 2003!???

[mustardjohn]

I was looking at my 2003 3.8 getting ready to order a cold air induction kit seeing how it would be put in. It looks to me like the 2003 already has CAI. A hose from the throttle body goes down to the MAF box into a filter housing and then out through the side of the fender well. It looks like the air is coming into the system from the passenge side fender well. What up with this? The part I was going to order is metal instead of rubber, it replaces the tube to the MAF and the filter housing and the air filter is installed in the fender well but I don't see how this would get any more cold air in than what is on the 2003 stock. Is it the metal tube that cools the air. I am confused. I don't want to spend $179 plus shipping for nothing really added.