AFE "Big Boost" BHAF Washable Filter Ford 7.3L Powerstroke
4" Inlet X 8-1/2" Width X 11" Long
Rated at 850 CFM
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It gets five stars if you want what it delivers
It makes a diy baaf stystem louder than the 6637 filter. Personally, I don't mind. The turbo wheel whistle also comes through much more. Again I don't mind. It sure feels like it lets more air through. The biggest Star goes to the flange, superb flexibility and snug fit unlike the rigid flange found on the 6637. I dig it:-)






