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      08-10-2009, 12:29 PM   #4
niqui
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Drives: Jet Black E92 M3
Join Date: Feb 2009
Location: Canada

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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 12:49 PM. Reason: i meant aftermarket filter also....