question about o2 sensors, CA spec has two, I want one Options

[6strngs]

I have a CA spec car... this means, my car has 2 o2 sensors instead of one. when I go turbo (hopefully very soon) I'm sure the downpipe will only have a slot for one o2 sensor... so, is there like a resistor or something I can do so that my car doesn't freak out from only having one o2 sensor?

[Negative]

I have 3 stock Turbo downpipes. I will check to see if they have 2 o2 bungs and I can get one to you. Also the second half of the stock 5s downpipe is the same design but I think the bolt pattern makes the exit come out to the pass side for some reason. I now I have one bolted up this way in my garage.

[6strngs]

I have 3 stock Turbo downpipes. I will check to see if they have 2 o2 bungs and I can get one to you. Also the second half of the stock 5s downpipe is the same design but I think the bolt pattern makes the exit come out to the pass side for some reason. I now I have one bolted up this way in my garage.

thank you! if any of them do have 2 O2 sensors, let me know.

and, nothing of the exhaust will be original. I'm talking about using a 3sgte downpipe and mating it to a custom exhaust, then, later on taking an aftermarket 3sgte downpipe and mating it to the same custom exhaust, nothing will be from the 5s at all.