Thread: N54 downpipes
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      01-03-2013, 06:31 PM   #2
Tee-Dub
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Drives: 2008 135i
Join Date: May 2009
Location: Vancouver, WA

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Wont hurt a thing. About 20hp and 30ft/lbs of torque. You wont pass emissions though unless you use a DP fix device.
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