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      06-02-2014, 11:49 AM   #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 DriveWFO View Post
badblack, have you looked into get some port work done on your heads? I would bet there is a lot more left in those stock heads. I've been trying to find the stock intake and exhaust flow numbers, but haven't come across that data. Heck, I bet some simple bowl work and a good 5-angle valve job would yield noticeable gains.
yeah i was thinking to look in to this the 750 Alpina has bigger heads than stock and it's n63.. someone told me it should be a direct fit.
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