O/R mid pipe, do I need 02 sensor extensions?

Hey guys, hopefully someone can answer this for me. I just received my o/r prochamber for my stock headers. I have a 2004 Mach 1 and I heard that on 04 models you need 02 sensor extensions. I also purchased a custom tune for it as well, so will that delete the code for the 02 sensors, or will I have to delete the code? Can I still put the pipe on and the car run the way its supposed to without the wires?

I think the front ones might reach but I'm not sure about the back ones. So at a minimum I need the front ones? Will my car run bad if I don't get the rear ones? Can I remove the light that will pop up with my SCT tuner.