DuratecDave,
All the posts that I have seen so far are in favor of the cat gutting and they say there is noticeable improvement. I would suspect the biggest reason that not everyone is doing this free mod is that it is illegal? I know there are states that do not require strict emissions testing(like Oklahoma :D) but there are sooo many that are very strict and I suspect the fines are probably outrageously high.
But we will see what happens. I just might do mine also in the near future.
