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      03-10-2013, 09:03 AM   #17
jmh
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Drives: F97 X3MC / F80 M3 / F90 M5
Join Date: Mar 2006
Location: Under a rock in NH and BOS

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Quote:
Originally Posted by NISFAN View Post
Sorry still confused, are you saying there are two sets of filters in each bank?
  1. A 'normal' air filter
  2. A secondary charcoal filter the exact shape as the normal air filter

And this thread is a DIY to remove the charcoal filter as pictured here, leaving another filter just above it?



Yes?
Yes the US spec cars have two filters in the airfilter housing.
One is the charcoal filter (grey color and in the upper half of the housing)
the other one is the regular (yellow) airfilter sitting on the lower half of the housing.
The DYI is for the removal of charcoal filter.
DO NOT remove the airfilter as it can lead to severe damage of your engine.
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