At the risk of offending the environmental folk, and in my now somewhat limited budget quest for more hp, has anyone removed the cats from their car? Speaking hypothetically of course

I have a high flow cat, and I also have some o2 enhancers that are not being used, Im thinking of just sticking in straight pipe and letting the o2 enhancers cover the electircal signal. Anyone have any experience on these cars doing this and what type of gains can be had?