I have looked through a lot of threads, but most are on best sound or best cat back.

I just would like to know how to remove the cat back on 98 Grand prix.

Previous cat backs had a stud on cat side, and nut on resonator side.

The stock cat back looks like a flanged nut on cat side that is welded on. However there is no nut on the resonator side.

Has the nut just rusted off, and if so, why is the resonator not loose.

thanks