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Old 02-18-2015, 11:40 AM   #21
bluesubie
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Quote:
Originally Posted by industrial View Post
If anyone can get real numbers on how well the various filters work (at filtering particles that is), that would be more valuable than looking for a HP boost.
A used oil analysis is a very good indicator of how good the air filtration is. You can always spot a K&N user because their silicon is usually higher than normal.

-Dennis
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