Quote:
Originally Posted by sammyg2
A K&N will work better than an old clogged up filter but will not outperform a clean stock filter on most cars (probably all of them)..
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This is my point. In at least some instances, and in fact probably most, maybe nearly all, the best possible filter is a dirty paper filter. The large amount of surface area allows sufficient flow, and the crud trapped in the filter effectively filters out finer contaminants than the new filter could catch.