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      01-21-2011, 12:56 AM   #154
Drives: 2009 E92 330i
Join Date: Jan 2010
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Originally Posted by intensee92 View Post
Question, so once you take out the charcoal filter right, did you all just replace the charcoal filter with a K&N filter and leave the other air filter in...? (two filters)

Or remove the charcoal filter and replace the air filter with a K&N one. (one filter)
I too am wondering about this. My K&N arrives tomorrow. I am impatiently waiting to install it. What is the advantage/disadvantage of the charcoal filter?

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