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      06-09-2009, 08:19 PM   #87
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Drives: 2013 E92 M3
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Originally Posted by powertrip View Post
You probably gain less with the x-pipe if you've already put free-flowing mufflers on the car. Unfortunately power increases from different parts are not cumulative.
I understand that but I read this to mean gains over stock with each scenario. Not additional with just the X-pipe but maybe that explains this.
2013 E92 M3 with ESS VT2-585 SC, StopTech BBK, ESS Full Exhaust, and a bunch of carbon fiber ... - SOLD
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