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      04-08-2014, 12:21 AM   #7
VailM3
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Drives: 2011 Z4 35is
Join Date: Jan 2013
Location: Geneva Switzerland

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with a 35i/is the 1st engine modd should be a cobb access port. By far the best bang for the buck. 2nd should be a FMIC followed by Catts. As per intake the stock one on the 35i/is is actually quite good and should come 5th on your list after a full cat back exhaust.
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