I am planning on replacing the JRSC fmu with an s300 chipped ecu. Will the existing o2 sensor work with a supercharged Prelude or do I need to replace the o2 sensor with a better wideband. And, if I have to replace the o2 sensor, would a PLX a/f sensor module with a bosch lu 4.2 o2 sensor be the right way to go? Other options would be appreciated.

uncledan

 

You can use the stock o2 sensor for narrowband feedback.
You SHOULD run a wideband oxygen sensor/gauge system to tune your vehicle