FWIW- I had a BHAF on my 01 and loved it. I just installed a AFE drop in on my 03, the AFE's are said to meet the OEM's filttration specs.
I had previously put a few holes on the intake side to try and get the filter minder to behave with a fresh stock element (made no difference that I could see. )
Well , I just ran 3000 miles through colorodo, Utah and back (World Supercrawl-we choked). with the edge on 5 and 9000 lbs of trailer the filter minder never budged from the reset position.
I'd love to tell you how the EGT's came down but I had just sold my gages to a friend wanting some used gages (I'm going to get the edge gage module when it comes out and I know my trucks EGT behavior).
Bottom line- I'm extremely impressed with the AFE drop in, the system has to be even better.