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BMW 3-Series (E90 E92) Forum
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K&N or AFE Filter In OEM Box
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| 07-10-2008, 08:48 PM | #1 |
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Driver
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K&N or AFE Filter In OEM Box
Has anyone tried installing a K&N or AFE filter in there original air box?
If you did you notice a difference, power?, mpg?, sound? I am just looking for better engine response. Thanks |
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