Thread: 2007 Z4 3.0si Custom Exhaust...
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      06-22-2017, 04:19 AM   #87
tIndy
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Drives: 2007 Z4 3.0i
Join Date: Dec 2016
Location: Indianapolis

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How much of a difference does the Magnaflow make in place of the secondary cats? I have done the muffler delete.
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