View Full Version : Stock or K&N

05-27-2008, 08:37 PM
hi i was wondering what kind of air filter you guys would recommend on my 2001 330 ci with just the stock air box.. what do you guys think of K&N or do you recommend another aftermarket brand or just keep it stock

05-27-2008, 08:59 PM
K&N is probably one of the best. If anything they are a great investment becasue you can just clean them and reuse it.

05-27-2008, 11:48 PM
I used to love K&N. I had one on all of my previous vehicles. (Maxima, NX-2000, Gti)
But now I worry about oil contamination on the mass air flow sensor and poor filtration. The newer cars seem to be more sensitive than the older ones.

I use the factory filter, but the e46 M3 version (13721730946) that is an extra 10mm thick filter instead of a black foam "pre-filter" glued to the bottom of the filter. This filter fits your car.

05-28-2008, 04:53 AM
in an E34, using an aftermarket filter won't do anything, beside poor filtration and if i'm not mistaken some have experianced loss of power LOL

05-28-2008, 08:56 AM
from my records and from what i read, i heard AFE in box air filters are the best. even better then KnN filters. dont shit on me though, thats what i heard.