At first i tought it was a blown exaust gasket,just before the manifold.But as i was driving the pipe has disconected where it conects to the cat .I guess it was weak near that collar,it got cutted...

I looked for a diagram in the haynes,nothing.Drove the car at the garage,that noise can awake any dead soul,i feel the vibration underneat the seats.
Heres my question, what section will need to be replaced? The whole section from manifold to cat or is there a shorter section after that.

Since its just before the 02 sensor connection, what happens in terms of drivability?
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jlp