Thanks for the suggestions. Are there any "bolt in" kits around to replace my cat? I don't want to go to headers, but would like the best flowing cat I can find. On my truck the two head pipes are separate and each goes directly into the twin inlet cat exiting thru a single opening that leads to the muffler. If my muffler ends up being full of pieces from the cat I will most likely replace it with a Magnaflow unit as well. I suppose in the end I could just go to the muffler shop and have them weld up something, but they always seem to do a less than average job. Mickey Mouse welds, poor routing, etc. Any muffler shops in the Phoenix area that take there exhaust work seriously?