No doubt whatsoever that at speed the air is cooler than at idle, but it is never as cool as the air outside of the engine compartment. Someone mentioned the radiator and the block as heat sources, I'll grab a hold of either of those before I grab the headers. And all the CAIs I've seen pull air from very close to them.
Exactly how is the filter "Fully open" to the engine compartment? Do you not see the Box that surrounds it!!, oh and the hole on the top of the box is covered by a see thru-plastic cover
. So the filter on that intake is exposed to about the same amount of hot eng bay air as the factory box. All I am trying to say is that FordRacing came up with this design for a reason, beleave me its is a functional CAI, but only when you are traveling fast enough to get more cool air flowing from the hole in the fender than the air that is flowing through or over the opening in the eng bay.


