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Old 06-15-2011, 03:02 PM   #12
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Join Date: Dec 2010
Location: MD, USA
Posts: 1,489
My Ride: 01 330CI 6MT ZSP EU3
You can leave it disconnected, since the new fan will use the same connector the aux fan is using now. And as a downside of this decision - much worse air flow, since the shroud of the aux fan is pretty big. Plus, take a look on my pics above, how much crap is collected under the aux fan.
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