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      12-10-2012, 07:49 AM   #19
Mike@N54Tuning.com
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Drives: 2007 335i, 2015 M3
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Quote:
Originally Posted by madmanhiker View Post
I'm stuck at 390 FBO with meth and race gas. Will the ISO help those of us in this config??? I just want to crack 400..... grrrr.....
I think it's a must do for all N55s but especially heavily FBO ones. Plus, it's free!

Mike
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