[Ram Jet]

Originally Posted by snot

It appears some of the tracks have banned K&N and other oil filters with the welded nut, including Mid-Ohio.

http://www.midohio.com/mid-ohio-cour...3-requirements

"The following oil filters are NOT permitted: K&N, High Flow, and Vortex"

There is also a recall
https://www.knfilters.com/mobile/recallkn204

Doesn't the nut just facilitate removal of the filter? What harm could THAT do?

Bill

P.S.; Oops, I just read the previous posts. You should never use a wrench to tighten a "spin-on" oil filter.