I'm willing to admit I don't know if they fixed the issue or not. If they did, great. But I've also seen a lot of independent tests conducted on filters. Mainly because I'm curious. IMHO, the only thing good about K&N is their marketing. Every time a K&N product is measured against the competition, it falls short. I think they're over rated, and I just won't run their products.

The duramax air filter test: https://www.billswebspace.com/AirFilterTest.htm
Pressure/flow tests: Construction comparison:

 

See the eyeball? Does it look like it cares?

 

It appears as though "bherder"will be giving ( more like needing ) lessons / classes on how to win friends and influence people ... Be sure stay tuned for more

 

I`m just glad the OP got the stubborn filter off.

 

Yeah, thanks. Got lots of good advice from members here. TBH, I would never have thought of the self-tapper thing. Very simple and also very effective.

 

I find it easy to go to the dealership and buy a filter there. The black one gives me an extra 25 hp and makes my oil smell juuuuuust right.

 

Wow, I'll have to give that a try!!
And to think I've been slowing myself down with chrome filters all these years

 

Yeah, well....everyone knows the chrome is for show and not go...lol.

 

What! You didn’t know Black was the fastest color!!! It’s a proven fact!