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      07-29-2009, 12:30 AM   #1
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Drives: 535xi
Join Date: Nov 2007
Location: toronto.

Posts: 140
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BMC air filter - which side is the dirty side?

firstly, i apologize for the noobish question...i am by no means even an amateur gearhead.
to make a long story short, this is my first time using a reusable air filter, i decided to wash it and give it a lube, i failed to remember which side was the dirty side that i would need to spray the lube on. i kind of have an idea, however, i think it would be wise to get some verification. rather not have any further headaches.

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