Boomin850 Posted May 25, 2007 Report Share Posted May 25, 2007 Need some choices here for a 3'' OBDII Catalytic Converter. The catch is...Ca emissions. I may be able to get it pass no matter what but whatever...I would rather have it pass legally. Here are the main concerns...Does the rear O2 NEED to be in the middle of the cat? Can it be after the cat?Give me some choices yea?Btw- this is for my moms car so that's why Im trying to keep it legal Link to comment Share on other sites More sharing options...
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