Doesn't the ECM use input from the rear O2 sensors to tune the engine? How does no catalyst impact that?Yes but the CEL will not turn off if you can live with that . If your going to do that they make a eliminator pipe to replace the cats.
I'd probably replace the exhaust manifolds while I was at it. I can hear my passenger side exhaust manifold leaking and it's about to drive me batty.May have to just replace cats. Thanks. MTG