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      08-03-2013, 03:40 AM   #52
ashmostro
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Drives: 2016 F80 M3
Join Date: Jan 2013
Location: Vienna, VA

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Don't bother with the fender vent... Instead route the air using brake duct hose and build a proper backing plate duct behind the rotor hat. Those fender well vents do nothing at all given their location.