the mother of all air filters

this is the NAPA 2790 air filter, or called the BHAF (Big Honkin Air Filter)

it stands 11.88 inches tall, 10.5 inches in diameter, has a 4 inch intake fitting and is just plain BIG!!!

here are some pics I took as I put this monster on. it is quite a tight fit to get onto the intake tube, but it will go with some moderate pressure and a large flat-head screwdriver

next to it is the stock filter just to show how big this thing is

[IMG]local://upfiles/7365/F24F8C1AF2094A1C91980D8D956E36EB.jpg[/IMG]

[IMG]local://upfiles/7365/D0F496E4A68B44528F46C918C83BCC1A.jpg[/IMG]

[IMG]local://upfiles/7365/9F7655690C214543B7E61ED9CD7B97F3.jpg[/IMG]

[IMG]local://upfiles/7365/8E19941598594C579CF174F3D26718B5.jpg[/IMG]

[IMG]local://upfiles/7365/2C5CF1C727E5486FB841CB8A33BEDA58.jpg[/IMG]

 

the last two show where I put the intake temp sensor and everything back into my truck.

the intake temp sensor takes a 1/2" bit

[IMG]local://upfiles/7365/4A0A528745604BDE9B7B790066C57D0F.jpg[/IMG]

[IMG]local://upfiles/7365/4C48FAE160AD45ADA7BB2CC7C2993C26.jpg[/IMG]

 

Just curious if you noticed a sizeable gain in performance from such an upgrade?

 

I'd be curious about the gains. In paticular any mileage gain. If I can get my 1st gen over 21 mpg's I'll be beside myself. Let us know please.

 

I filled my tank up yesterday, so far nothing different other than I can tell the turbo spools a tad bit quicker and starts to spool a few hundred rpm lower.

just from the way the engine sounds I can tell she is breathing better, which is a BIG plus on a diesel.

 

will this filter work on my 01 dodge 2500?

 

Did you have to use a Sledge Hammer to close the hood or what? that thing is a beast. It looks like a filter off of a Mack Put an outside airbox on Beasty and you will be the man!!!

 

Nothing new. Most of the 1st Gen folks have been running them for years now.


FYI ~ Alternate BHAF partnumbers ~

Fleetguard AH19037
NAPA 2790
WIX 42790
Baldwin PA2820
Hastings AF1012
Donaldson B105006
Donaldson ECB15006
Cummins 3912986
Cummins 3924541
Fleetguard AH19037
Baldwin PA-2806 (metal housing)
Baldwin PA2820

 

yep!

I have one in my 93 as a stock filter unit!


even introduced the filter housing to a couple new "breather" holes recently with my 2 1/2" hole saw

 

yep. . .it will fit nicely on the 2nd gens.

she does rub on the fire blanket on the hood, but then again my bypass filter return line does as well