This is the K&N set up I got off ebay. Its the FIPK or what ever they call it. Now the cold air intake duct that mounts above the rad is retained as is the ducting that used to go to the stock air box. The K&N came with a sort of air box that is open on the top, but conforms to the contour of the underside of the hood with a foam gasket mating point. So the same amount of cold air or semi cold air that used to go to the stock air box now goes to the K&N box, and is sent directly to the bottom of the cone filter. In theory this should work MUCH MUCH better than a ghetto fab job where you just take out the stock air box and all cold/fresh air ducting and slap a cone(s) on the end of the intake.

Check out the pics of the system I put on.

Here you can see the box and the foam gasket where the hood closes onto it, and you can also see the stock plumbing going to the box.

Here you can see the stock ducting where it exits the fresh/cold air to the K&N box and cone filter.


Here you can see the stock plumbing on top of the rad where it pulls in the cold air.


If the K&N FIPK system was not set up this way I would never bought it.......the fact that the K&N retains almost the same system as stock, but for the size shape and configuration of the air box itself, and how its easy to see how cold air can still be delivered directly the cone thats in K&N's version of a air box was one of the bigger reasons I did buy it.

 

Very clean installation. In fact the whole engine! But I think you would benifit with some ram air in to that compartment. You should look at that link Greystreak has. That stock feeder tube for the F250 is better than the one above the rad. (cooler air) You've given me some good ideas.

 

In my opinion, if you travel dusty roads frequently I would prefer to stay with the stock air box and inlet tube over the radiator. Also the 460 intake is much lower if your encounder deep water areas. I don't and I like my 460 air intake tube. It delivers cold air from the area in front of the radiator and rams the air in on the highway throught K&N drop in. I have not gotten around to insulating the inlet parts yet but it is on my list. The ford part number on the air inlet tube is
F3TZ-9A675-B if it is available at one of the sponsors or Ford.

 

The lower ram tube hooked to the stock filter is likly to drown the engine. But if it is hooked to the system like street gang, I dont think it would because the water would have somewhere to go. (The box is not air tight)