Got the ICEBOX installed and need a prefilter for the air filter. I would rather not oil it if I can help it. I looked on the internet this morning for about 20 mins and never found anything. Anybody got any ideas on where to look for one? Ended up going with the S&B filter just because I heard a couple guys talking about the Amsoil ones collapsing.

 

Amsoil has prefilters. Here's the link:
https://www.amsoil.com/storefront/eapf.aspx

If you can give me the dimenstions of your filter, I can find a match. Would need height, base and top diameter, and flange opening size might help. Once I have that I can let you know which one and how much it is.

Heath