Has anyone actually ever traced where the air is drawn from in their gas KJ?
I have.
On my 2005 (before my recent cold air mods) the snorkel faces a small plastic diverter piece which is attached to the frame crossmember in front of the snorkel. Now, if you still have this diverter on close you hood slowly and look in over the passenger headlight as you close it. Also pay close attention at the foam seals on the hood and how they interface with the snorkel and diverter. You will quickly notice that it appears that the entire diverter/snorkel assembly seems sealed off from everything.
We know this cannot be totally true - engines need air.
Now, open the hood again and look at the rectangular cut out on the hood above where the diverter/snorkel/foam seals interface. Follow that opening under the fiberglass head liner and you will see that it opens up at a hole in the headliner that, when the hood is closed, falls to just to the right of the stock air box. Basically the air intake is mostly from behind the left side (as you face the engine bay) of the air box and some cooler air should come in from along the gap at the edge of the hood and fender. Most of the air is probably drawn from under the hood though - air will not be very cool compared to that outside the engine compartment. There also may be some that is drawn from a small opening where the snorkel/diverter/foam intefaces from the engine bay area between the engine and radiator. In mine there was a triangle-shaped gap of about 2" square in this area.
See
My Version of the Cold Air Intake post in my mods thread near bottom of page three to see what I am talking about.
In the 5th photo you will be able to see what I am talking about.
John
];')