Last night while doing the transmission work, I also pulled the CAT off to inspect it and see what it looked like.
It turns out that it looks very good to me. If you see something I don't please let me know.
Unfortunately, I broke stuff while removing the CAT. I snapped off part of one of the studs in the head, and also snapped one of the bolts that holds the springs on the other end of the CAT. The bolt isn't a big deal to replace/make new (a bolt and tube will suffice), but the stud may be a pain to replace. Suggestions on how to go about replacing it are welcome!