I hear ya Ron, I hear ya!
I can't tell much from the recording (sorry) but I can tell you that a bad cat' sounds like a rattle, like a golf ball in a small coffee can. The tin around the outside of a cat' can buzz, however. Leaks can sound like many things because of their size, distance from the engine, yadda, yadda, yadda.
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ASE Certified Master Automotive Technician w/L1.
ASE Certified Master Medium/Heavy Truck Technician.
Certified EVT (Emergency Vehicle Technician)
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