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      05-31-2012, 04:58 AM   #20
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Drives: 2008 328i 6 speed
Join Date: May 2011
Location: Chicago

Posts: 195
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some people seem to get amazing results with this mod and claim 40hp, and others have dyno'd with gains of under 15whp if I recall correctly. If it were me I would spend my money on a tune(which I have and am satisfied with) and headers if they become easily attainable.
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