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      10-20-2013, 05:44 PM   #4
DanFromTucson
Private First Class
United_States
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Drives: Z4 M Coupe
Join Date: Aug 2011
Location: Austin, TX

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I have them on my M Coupe. I didn't notice much of a difference, but that can be typical for a modification that raises power across the rev range. At least, that's my optimistic view.
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