http://www.supercub.org/forum/showthread.php?53808-Air-filter-options&p=718277&viewfull=1#post718277Have two. Both have lived on the shelf for a lot of years. Switched to Donaldson. Do a search. Been talked about before.
Yup. Love it. Lou1
There's a persistent rumor of someone using Uni-filter foam to replace the Brackett replaceable element (https://unifilter.com). Reportedly they flow and filter well enough in other applications. Plus they are allegedly easily maintained by cleaning and re-oiling. They sell sheets under their accessories section in various thicknesses, hole density, and even a dual density sheet. Must be for Experimental applications.