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      04-04-2013, 08:56 AM   #77
Addicted to Speed.
jawwadh's Avatar
Drives: 08 e90 m3, 08 tl-S, 13 328xi
Join Date: Aug 2011
Location: Chicago.

Posts: 688
iTrader: (4)

I have a KN, its awesome, no vibrations. Sounds a bit better. The car felt slightly more responsive but then again I did have a dirty stock filter. I bought it when Advanced auto had a sale and it was 55 bucks.
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