Exhaust cutouts?

[UNITY]

I did a search to see if any one had brought them up. Has any one tried putting electronic cutouts before the cats, plugging up your O2 sensor hole, putting your O2 sensors before the cut outs and then tuning?

Probably would be horrible for noise on the street and get you tickets in CA but for off road when with noise canceling head sets on...

Let me know if some one knows any thing on the subject. Also, maybe wide band O2s?

ALSO: this would be behind a supercharger.

Thanks!