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      02-08-2013, 05:52 PM   #27
Andrew@ActiveAutowerke
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Drives: 2014 435I M-sport
Join Date: Dec 2011
Location: Miami Fl

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Quote:
Originally Posted by GIdriver View Post
OP: FYI an air filter is not gonna make any significant power gains. AA's green filter is well built and that's what I'm using right now. Intake sound/noise may change but that's it. I believe AA's is better built than K&N, but that's just my appreciation. Want bigger gains? Go HFC/catless or better yet: S/C.
We saw gains of up to 8whp on vehicles equipped with the older style paper filters.
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