[mpg_numbers_guy]

Replace it with the least expensive, known-to-work catalytic converter. Don't go cheap on the fix. Do it once, do it right, and it'll last for a very long time.

Get all new stainless bolts and washers.

Buy some Rustoleum 2000F rated primer and paint and paint everything, especially the catalytic. Bake it as instructed on the back of the spray can.

Install it, do it right, and save yourself some headache down the road. Your car will thank you later.

It can be done for less than $300 in parts all together, including paint, stainless hardware, and any springs and/or gaskets required. Replace it all with new.

Rockauto had the best deal when I replaced mine not that long ago.

Your first attached picture doesn't show up on my end.