Thread: e39 540 tune
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Old 02-14-2012, 02:04 AM   #2
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if your 540 is 1997 and is 6spd than a Mark D tune will make the most difference for the money. If you car is 1998+ than a tune doesn't really do much. 1997 540's were made in the M-factory and use larger intake manifolds from factory, later on 2000+ DINAN E39's used 1997 intake manifolds.
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