Come on guys, can't you see the sarcasm here?
The KN does a good enough job of keeping potentially harmfull particles out of your engine. This is a case where more (or better) is not required.
When I get a new vehicle, I simply buy a KN and then forget about it. I never need to buy another! Then I go on with my life and furgetaboutit!
Just 2 cents.
Serge