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      03-04-2014, 09:11 PM   #6
badblack550xi
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Drives: F10 550i 2011 F90 2020 COMP
Join Date: May 2013
Location: NJ

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Quote:
Originally Posted by Mbbrewer View Post
I was waiting on your review before I pulled the trigger in this. Not enough 550's with aftermarket exhaust to get a lot of attention.

Having the valves open makes no difference on stock exhaust.
time to make it none stock
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