I had a blowing exhaust that developed last week, sounded great but that's another story.  Thought I would sort it out so got underneath and found the joint between the cat and back box was blowing.  Ordered a new gasket that arrived yesterday!  Job for this morning split the joint replace the gasket and rebuild!  How wrong could I be!!!  On jacking the car up it became aparant that the con section was badly corroded hence the blowing.  It turns out the end of the cat wash rusted through and the back box was badly rusted.  So I need a new cat and back box!  Any recommendations?  Car is standard 135! (at the moment) 

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