Quote:
Originally Posted by jklamerus328xi
You make a good point. It still concerns me because of that charcoal filter. Did you remove that filter on your 335? Some people say delete it, others say don't. Some people say K&N is the way to go, some don't. I have had K&N's in every car I've had before my 328 and had no trouble. But when I posed the question to a BMW garage owner he all but had a coronary when I told him I put a K&N in my car. I've already returned it but I'm still not sure… maybe I should have kept it. There seems to be no real solid answer when it comes to this. I'm still researching….
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I'm waiting for my free maintenance to expire, then I will.
My friend said to looking at this, I don't know if it applies specifically to your car. Also look at the link in the first post.
http://www.e90post.com/forums/showthread.php?t=21590