The cats have to be pretty bad then. Im sure the tube going from my driver side manifold for the egr thats broke isnt helping either then.
I also remember reading a few times, something about an intake port or something (dont remember off hand) that clogs up, and its relatively easy to clean. Would this contribute to anything aswell?
well if you will be in the clear, don't gut them, recycle them, i got $50 for one and $40 for the other when i scrapped mine, i replaced them with a single cat in hopes that with the 02s and all it would help the truck run the way it was meant to