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      04-19-2012, 02:48 AM   #1217
MikeCOUPE
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Drives: Z4M Coupe, E46 M3
Join Date: Jan 2012
Location: Miami/NOLA

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Do I need my rear O2 sensors (post cast) connected? I installed downpipes and was wondering if I need the 02 sensors connected.
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Gen IV Viper -- 135i -- FBO Cobb Stg2+ -- E46 M3 -- Z4 M Coupe
CTS-V -- Gone -- AP2 S2000 -- Gone -- AP1 S2000 -- Gone
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