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      05-21-2012, 12:21 PM   #2
DUI Elite
///M at Heart

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Drives: 2006 SGM E90
Join Date: Jan 2011
Location: Chicago, IL

Posts: 1,693
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Sorry, last question - should I do this before my mufflers (like planned) or before my secondary catalytic converter? I don't want to throw codes for "service engine soon" because I failed the car's emmission test.