[jsbihn]

J-man, Not sure I understand.
So you are saying that if I gut the cats, I can get this "SIMS" thing and put it in the rear sensor spot and it will delete the SES light (and of course thats the only way to kill that light). The down side is it will cause a drop in performance and gas mileage, basically saying that the truck will not perform properly.

On the other hand, if I gut the cats and leave the sensor in place... the truck will perform fine... I will just have the annoying SES light always lit.

Is this correct?

Also, is there an easy way to gut the cats on these rigs? Or is it basically remove all the cats and either use a high pressure washer or a rod to break apart the honey comb?

I was thinking of cutting the cats out of the exhaust and slipping on a exhaust pipe to replace the missing cat area. Do you think that might be an easier solution?