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      08-10-2009, 11:29 AM   #4
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Drives: Jet Black E92 M3
Join Date: Feb 2009
Location: Canada

Posts: 3,102
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nice, but i would assume the gains decrease significantly if the car already has a highflow exhaust?

Last edited by niqui; 08-10-2009 at 11:49 AM. Reason: i meant aftermarket filter also....