Originally Posted by 808MGuy
From my experience with other cars, extending the O2s is typically done when removing the precats and leaving the main cats in place. The secondary O2 is typically located between the precat and main cat but when the precat is removed, the O2 is moved behind the main cat to keep the engine management system from throwing a code. Just from seeing what is out there, it appears that most companies are getting around the code by upgrading the software to ignore the code.
That sounds correct. The secondary sensors on this X-pipe are after the HFC's. But there has to be a way to extend the sensor wires as opposed to just leaving the sensors out and flashing the ECU.