So what are you trying to compare this to, paper, foam, other k&n type media or what?
I'm not really compairing it to anything. All I'm saying is that I like foam filters on motors I dont want to tear down every winter.
Maxx asked about the legitimacy of the test and I gave him my thoughts on the subject.
Its a fact that K&Ns let more than an acceptable amount of debris through.
I have done back to back tear downs on predators with the same intake, one with clamp on twin air and clamp on K&N filters. Both with outerwares. Ridden about the same amount of time, same areas, same oil, same everything.
The cylinder walls on the K&N were in worse shape than the twin air. The debris on the piston was more prevalent on the K&N.
Those are my findings, so take it for what its worth.