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  • Big Honking Air Filter

       (3 reviews)

    B H A F


    This is a short list of BHAF that can be used on the Cummins 5.9L diesel.

    Some of the BHAF are the same size and will be listed together.

    L= length, OD= outside diameter, ID= inside connection diameter, 

    BHAF: NAPA FIL 2790, WIX 42790, Fleetguard AH19037, Hastings Af1012, and Baldwin PA2820

    L          11.88”

    OD      10.50”

    ID         4.0”


    Pre filter for above BHAF



    BHAF: Napa FIL 6637, WIX 46637, Fleetguard AH1141, Hastings AF2329, Donaldson ECB085011, Baldwin PA2818 and Cummins 3912020

    L          12.38”

    OD        8.50”

    ID        4.0”


    Pre filter for above BHAF



    Donaldson B105006

    L          10.50”

    OD      10.50”

    ID          4.0”



    Surface area

    12.38"h x 8.5"d = 330.59 in²

    10.50"h x 10.5"d = 346.35 in²      ~ 04% larger than #1

    11.88"h x 10.5"d = 391.87 in²      ~ 18% larger than #1    ~ 13% larger than #2




    Prepared by:  J. Daniel Martin / Martin’s Mobile Maintenance

    AKA:  ibmobile


    • Like 3

    User Feedback


       1 of 1 member found this review helpful 1 / 1 member

    another great article.  I used this when I replaced my air filter and went with a new BHAF.

    • Thanks 1
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       1 of 1 member found this review helpful 1 / 1 member

    Another great article by Daniel. Thanks IBMobile

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    I have this in my truck, yes I have to put the stock one back in to pass smog ;-) 


    A girl's gota do what a girl's gota do.


    Well worth it.  Glad to have some comparative data.


    This is the most credible site I've seen for info on my truck.


    Thanks to all those who contribute these articles.

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