Every chance I get I pull a K&N and feel the intake track and there always dust in the intake ...Always ..........Maybe its just me or the southwest ( have check at races on the eastcoast and found the same too...) I will not back up a motor I build that has a K&N on it ....K&N do breath better and let fine dust in your motor ...Or it could just be people dont know how to oil them right ?...
But the K&N guys at SEMA ask me to leave there booth each year when I ask why ....

I'm sure in OH its not as bad as the hot dry AZ.... But I'm up on the northern platoe of AZ were we are cooler ..And still find fine dust in the intake tracks ...
UNI for me ...Sorry
K&N's make me good money fixing sandblaster motors ..
If you run them pull it off and put your fingers down the intake and see if you get dust ... It could just be my luck i'm sure

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