I have deleted the cat on a couple 01+ cars without major issues. Non fouler trick is the easy way and it works well if you don't have a tuner. I personally use the zzp emulator which has worked flawlessly for the last 3 years for me. I have done the good old fashioned disable every single rear o2 code method as well and it will just go rich for 10 seconds on the highway to try and test and then after it fails all is well.