Thanks ImEazy
I had time yesterday to pull stuff apart and verify.
42 millimeters = 1.65 inches
I measured just under 1.75 inches for the outside diameter.
You were on the money size wise.
It also looked like the 6' one would fit easily in the space.
So I orderd on of the 1 3/4" X 6" UNI Flex Core Sock Filters.
http://shop.thumpertalk.com/catalogs...ault.asp?p=512
I left the cover off of my current air filter box. Now I have a little bit of a stutter in the powerband. I imagine once I get the free flowing UNI pod on there that I am going to have to fiddle with the mixture setting a little until I get it right.