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hk4site, I would be interested in seeing this report. Having owned several K& N filters and knowing their construction, I am very doubtful that a dirty paper filter will outperform a dirty gauze filter. You put the same amount of dust on a paper filter and an oiled gauze filter and the paper filter should become clogged long before the gauze filter. And you can clean the gauze filter as often as you want, so it is the last filter you ever need to buy. Not so with a paper filter.