Can you run o2 sensor on just one port?
The car has 4 into 4 side pipes and there really is nowhere to mount an O2 sensor near the engine.
And the sensors don't have to be right near the engine to function. Look at all the long tube headers out there, they have them placed quite a bit from the engine and they work fine.
If you don't have any pipe past the collector to place the o2 sensors in you might as well go with an open loop tune and forget about those completely.






