I have a BMC aftermarket filter too...just cleaned it for the first time the other day after I intalled it 2.5 yrs and 13k miles ago. There was no large debris just very fine fine black dust which is probably a combination of many things including brake dust. Edevlin, I think you are over-servicing your filter and are due for a CEL and foulded MAS anyday now. But to each his own. Jus my .002
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