Quote Originally Posted by Yarbeau View Post
I have an 02 GTP.
Going with TOG headers and TOG stainless 3" with cat. Tuned PCM with Cat codes, rear o2 sensor codes, and egr codes all removed etc...
Is it beneficial to run an o2 emulator to keep my fuel trims? Or do I need the real rear o2 sensor to not run flat out rich?

I tried reading through all 9 pages and deciphering the correct information but still didnt come to a conclusion.
As long as you have the catalyst diagnostic test shut off, you don't need the rear O2.