Quote:
Originally Posted by InvaderTrax
No cat on an OBDII car should throw a code on the second O2 sensor, which doesn't determine your air/fuel, it's just a smog checker. If you go with no cat, pick up two spark plug antifoulers, drill one out, and slide your O2 sensor into that one, then put that into the unaltered one, and screw that into the sensor bung. That should keep you from throwing a code. I've heard several different exhausts with no cat, some sound fine, others sound terrible. A resonated test pipe will sound better than a hollowed cat or straight pipe
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i have megan test pipe with there header and catback, at first it throw po420 than when i use the antifoulers it was ok but after 2 weeks it throw the
po133, so iam just resetting it and have not found a way to get rid of the cell
i was going to get a new o2 sensor for the bank one but there was another guy in po.com had the same problem and it didnt help when he put the new one either.