My car has Protomotive blow thru/tune. It is tuned for Catless.
I am changing the exhaust. Rear O2 sensors are kind off stuck and bang up.
Could I just plug the holes in new exhaust and not install rear O2? They are designed to read Cat efficiency and I have no Cat anyway.

 

If they are tuned out you can. If you told Todd you are catless then they probably are. My Proto tune is. Try running them unplugged and if there is no service engine code you are good to go.