I installed long tube headers with a Mac Pro chamber midpipe with no cats. and I only installed my front O2 sensors. My rear sensors didn't reach to the mid pipe bungs. So I just had the muffler shop put 2 plugs in them. I obviously have a check engine
light on for that reason.
My question is, do I need the rear O2 sensors? Or can I just use the MIL Eliminators for the front O2 sensors?