After cat 02 sensor removal. What are the pros/cons?

[VorTecxas]

Is there an advantage or disadvantage from removing the after cat 02 sensors? Just curious before I get my tune if I need to have them tuned out.

 

[454ss]

that way youll never have to replace one and can remove cats without the light coming on. I just put simulators on mine.

 

[VorTecxas]

I'm putting high flows on. I still want to run the cats for fuel efficiency (as far as the PCM is concerned), but I'm deleting the EGR and AIR. I just want to know if removing them will affect fuel efficiency or anything. I'm not real worried about replacing them, If I keep them the bungs will be welded in an easy-to-turn position, I'm having the full exhaust custom built. And I haven't ever had the CEL come on after removing cats, I've removed them on two of the trucks I've had

 

[Gatorboy]

The O2 sensor behind the cat is really only there to sense if the cat is going bad or not.

 

[Kyle97GMC]

I havent had my downstream O2 sensors for about eight months and havent had a problem with anything

 

[aggieman]

You can have no performances losses because of the post cat sensor

 

[VorTecxas]

Thanks, already sent my PCM to the tuner, having them tuned out