Thread: supersprint headers + RR o2 sim for sale
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      04-21-2009, 07:17 PM   #12
ARA5HE90
ARA5HE90
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2007 328XI  [0.00]
Quote:
Originally Posted by iAerodynamic View Post
i believe o2 sensor is to trick the OEM sensor so it doesn't throw code when exhaust is going out thru headerS? or osmethign like that
the o2 sensor is to keep the CEL off so that you dont have any problems
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