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M3DCTBT · 11-09-2011, 07:14 PM

The X pipes that make the best power merge at the beginning after primaries. RPi and Gintani. The stock style x's seem to make less when tested on our dyno in my experience.

11-09-2011, 07:14 PM	#83
M3DCTBT First Lieutenant 34 Rep 372 Posts Drives: E92 M3 Join Date: May 2011 Location: New England iTrader: (2)	The X pipes that make the best power merge at the beginning after primaries. RPi and Gintani. The stock style x's seem to make less when tested on our dyno in my experience.
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