Hey Guys
I have a question that hopefully Allen will chime in on, I am thinking about removing my cats, I have a hypertech, (A Nelson tune coming soon), but I was thinking, with out having a good tune, and not having the rear o2 sensors turned off am I going to lose performance because of the rear 02 sensors reading incorrectly and the pcm trying to adjust for it. I just want to make sure I don't mess up by taking the cats off. Anyone done this with out a tune???
Thanks