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      02-09-2013, 12:34 PM   #54
Fully_Bolted
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Drives: E92 335i
Join Date: Sep 2012
Location: USA

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To make things even more interesting- since the factory o2's are post turbine, that certainly has to effect things if you are trying to time the exhaust pulses down stream in a preturbo o2 design that also has WAY less back pressure.