The stock box with the fleetguard filter works fine for me. I have added a 4" black sewer pipe on a toilet flange bolted to the bottom of my air box and it goes down to the underside of the bumper and has a 45 degree elbow and a set-up rubber fitting to act as a funnel to help it catch more air and create a possitive air pressure on the intake side of the box. Back when I used the edge juice, I could turn up the power with the AFE stage 2 filter and cause the ECM to give the clean filter warning. When I when back to the stock box with the ram air, it wouldn't trip the service filter warning. That tells me that the deep OEM filter flows pretty good air, at least with a little positive pressure feeding it. I got sick of dealing with the oiled filter as it seemed to dryout way to often and the oil film and dusting on the intake that resulted from it made me trash the AFE. I have also added an RV dump valve to the ram air down at the bumper level so that I can just reach down and close the intake off it is going to be raining and also in the winter when I don't want any cool air help. As well I have a piece of aluminum sceen between rubber fitting and the pipe to keep the critters and leaves etc. out. I sleep better knowing that the engine is getting clean air. It looks lower in the picture than it realy is. It is only about 3" below the air dam on the bumper.
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