Ok, so i have a 1995 lt1 Trans Am. I just bought some pacesetter longtubes and Have a question.

My car stock has 1 cat converter. And im PRETTY POSITIVE NO REAR O2 SENSOR.

The only O2's are the ones on the headers. So I will be getting a custom catted y-pipe made with 2 cats.

I also bought a cutout and am not sure where i should put it.
Before the cats, which would mean if cutout was open, i would be running headers only. (will that throw codes, and damage O2's?)


Or should i go with the cutout after the cats meaning headers and catted y, when the cutout is open?

Thanks!