Quote:
Originally Posted by DifferentPointofView
Most people aren't concerned about restriction, it's mostly filtration. Power hungry guys are usually worried about restriction from the air filter. If you talk about not running a K&N cause they don't filter good enough but you don't change your filters for 60k or 70K+ miles, and you just shake the loose dirt off, how good is the filter filtering even after a good shake? That's just my question.
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Well, let me shock you (it surprised me at first)
Dirt is a Great filter!
In fact it catches dirt better than most things. Don't believe me? Check out K&N's literature, they state that their filters filter best with about 1/4" of debris build up.