I am in one of the last 'free' cities in Texas and we don't have emissions check for our inspections so I can delete the cats in my ACR if I choose. Questions is should I? The car is a Hennessy 650R so it has their in house made headers, 3" cats and 3" exhaust. I do not know who made the mufflers or cats.

I was thinking of deleting the cats to give me a better flowing exhaust and a bit more HP in the higher RPM band. From those that have done this, do you recommend or what is your advise/comments?

As far as sound, my RT/10 had no cats with headers and B&B- no issue with sound or smell. My GTS had no cats with B&B- loud inside but otherwise fine. My SRT10 Ram has no cats and can't tell- its fine. Not worried about it being too loud outside, but if it has stupid drone inside or any other ill effects that is what I am looking at finding out before spending the money on cat deletes.

As far as O2 sensors, with the MOPAR PCM do I need to use simulators or does the PCM take care of that?

Appreciate the input!