I don't know that it's that big of an emergency.
I expect if the K&Ns let in too much crud, they wouldn't sell them by the truckload the way they do.
I'm no engineer, but my understanding of the way these things work is that they can theoretically get a little more airflow because they have less "filter" to block the airflow. When you have less filter, you also have less filtering, so it's a compromise. The paper filter compromises on the side of filtering, the K&N on the side of (theoretical) airflow.
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