What is the number for the CAT air filter that slips on the end of the air intake?

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For an 01.... sorry

 

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

 

It's called a Big Honking Air Filter (BHAF). You should be able to find more info on it here somewhere.

I gotta say, I love mine. I made a cold air intake for it out of some scraps of aluminum and some pop rivets, but you don't really need one. The BHAF will just sit where the factory air box was.

While your in there, you might want to remove the silencer from the turbo inlet. It'll make a nice whistling sound then.

 

Has anyone had any problems with their BHAF getting water and mud caked on it? I just switched from an oiled K&N to a BHAF and when i took the K&N cold air dam out, i noticed that it had been splashed with mud and water over time.

 

I put one of those water resistant covers over mine from outerwear. It's like a water resistant sock that slides over the paper filter element and keeps big chunks of mud and water from clogging the filter. Also, there is a version of these filters that's made for marine enviornments and the actual filter is water resistant

"Outerwear cover wr3325-105" is listed above