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joelselman · 10-03-2016, 02:07 PM

Don't know about the "M", but the stock Z4 is equipped with a siphon in the tank to transfer fuel to fuel pump side. I've been on road courses and had no issues with less than one-quarter tank.

10-03-2016, 02:07 PM	#3
joelselman Private 5 Rep 59 Posts Drives: 2005 Z4, 2001 530 Join Date: Apr 2014 Location: lake havasu city, az iTrader: (0)	Don't know about the "M", but the stock Z4 is equipped with a siphon in the tank to transfer fuel to fuel pump side. I've been on road courses and had no issues with less than one-quarter tank.
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