i wanna gut my cats.....has anyone tried the O2 simulators? and whats the deal with this ls1 edit that can delete the rear O2 sensors from the computer??

 

O2 sims can work. I use them and they are ok. The only problem I have had is once in a while I get a high voltage SES light for a rear O2. As far as gutting the cats it really is better to get a smooth pipe in there instead. I have done the gutted cat thing. The problem really is the stock Y sucks ***.