I just finished my 6637 mod and was wondering where i can get a prefilter for this filter?? if needed

 

You don't need a pre-filter with the 6637.

 

Plowhand is right. You don't need one, and honestly I would put on one unless you are willing to clean it very regularly. We use them on our dirt cars and they have to be cleaned weekly just for the dust and grease. That being said, if you still want one for looks go to the outerwear web site and they can make just about any type custom prefilter in several different colors. Adam

 

Here's one from the NBS truck guys. I don't know if it's a pre-filter or not but it sure is pretty.

https://www.ford-trucks.com/forums/5...installed.html

 

Try Pantyhose.

 

I kind of like my big ole plain filter, just me though.