yeah my filter is 5.5" around and 7.5" long with a 4" inlet
I been running womans knee high panty hose over the K&N and it has been great keeping the dirt,mud and water from getting to the filter I have over 36 hours on my K&N and it still looks out of the box clean thats how good the .25 cent panty hose work!
the only thing I need to watch out for is standing water that is deep enough to reach the filter that is the only reason I want a box