I have two pre-cat sensor ports and two post-cat sensor ports; just as the stock configuration. The difference is that the two post-cat sensors are on a single pipe now. If there are issues with one of the banks, I can see some confusion by the overall system since the post-cat exhaust will be a mix of good and bad pre-cat exhaust. However, if the car is running well, I suspect that there will be no issues.
Now, I just need to find the connectors for the post-cat sensors. I'm hopeful that this is part of the M3 wiring harness that is required for the motor. Otherwise, it's going to be quite a fun job to determine where those wires need to connect to in the harness. |