Well I knew my cat was starting to go bad, but I planned on just replacing it with a cat-less downpipe. Unfortunately I've only got one friend that can help me and he has been very very busy lately. I don't know any other mechanics or shop owners/workers. I just would rather change the cat myself if it's not too difficult, instead of paying a few hundred dollars.

I love my pontiacs and I hate seeing them like this .

What would you suggest for a replacement bolt on cat?

Thank you for the replies!