what does it stand for, what is it and where can i get one. Im buying a cummins tomorrow and im already making a list of all the stuff i will need, so far i have

-Bully dog big fuel kit
-Atometer triple pillar pod
-Autometer Boost, Pyro and fuel PSI gauges
-4" exhaust system
-BHAF

If anyone wants to chime in and lengthen my list any, please feel free, although, i need to still have money to make payments and i need to drive it daily 70 miles at minimum

 

A BHAF is a Big Honkin Air Filter, it's actually a big rig filter.Here are the part numbers.
Fleetguard AH19037
NAPA 2790
WIX 42790
Donaldson B105006
Baldwin PA2820
Hastings AF1012
AFE 20-40044
Carquest 87790
John Deere pmah19037
Big A 93790
Caterpillar 3i0005
Fleetrite ahr819037
Luber-finer laf2531
Fram ca6818
UNI 908

Outerwear cover wr3325-105

You don't NEED the BHAF, or exhaust. If you want the boost in power, get a used EZ, or Van Aaken for $200.

Enjoy the new ride!

 

thanks, my shop that i work at deals with Wix air filters.....i will be sure and grab a 42790

 

This is a BHAF:



Big rig filters are a lot bigger. The parts guys said the BHAF uses included forklifts, generators, Standby engines etc.

 

The BHAF has a very large and loyal following, but time, and time again, it's been shown to show a hp loss from the stock filter in controlled tests on the dyno. If you can't see an increase on the dyno, how are you ever going to fell an increase on the street?

Others argue it improves spoolup, which also never shows up on the dyno as a steeper increase to the hp curve.

Lastly, many say it decreases egts. How can egts be decreased by using hot, underhood, air? Some proponents have done underhood temperature tests and claim the air, there, to be just slighly warmer than ambient, which are simply bogus results, including when a heat shield is used. Plus, when the SAE formula for hp correction on a dyno is examined, it shows that air temperature has a much larger effect on power poduction than even altitude.

The only argument I've ever seen for the use of the BHAF, which makes sense, is improvement to filtration.

 

i have one, and it wasnt that much more than a new drop in filter

filter1.com, use the wix part #

 

So, what's the opinion on the Scotty?

 

you may be correct. but will the stock air box let the turbo sing as loud? i doubt it.