If you want the lc-1 to take care of the fueling look at a turbo tweak wideband chip. You will need a scan master, power logger, and 50lbs or larger injectors. Your other option is a standalone. I have the power logger and scan master. Yes, I have the stock o2 in the car and the lc-1 tied into my power logger/scan master. I did at one time hook up the other out put on the lc-1 to my stock ecu but ended up reverting it back to the stock sensor. If I were you I would leave the stock 02 alone and set up the wideband as a standalone or tie it into the power logger/scan master if you have one. The other out put wire dose not have to be hooked up to any thing.