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Old 08-26-2012, 01:36 AM   #17
bimmerboy
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Join Date: Mar 2012
Drives: 2009 135i
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at the stock power levels, I would say its mostly true... Hell i would even rip the stock airbox and throw on a 3" K&N filter for shits and giggles.. There is something to be said about a properly designed intake (like Airaid or SRT) specifically for your car though...
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