Chunk of Cat in Exhaust

[Jacob Michaels]

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While doing exhaust work on my recently purchased 200q20v, a chunk of cat.
converter substrate was found in the left exhaust pipe before the middle
resonator.

I figured that the cats would need changing (orginal cats, car has 140K), but
this seems like it is not the normal way a cat fails.

The car pulls 1.8 bar and has a IA III+ chip and right now runs great. Any
ideas if an anomolous engine event caused cat explosion, or is this a sign of
something more chronic?

Jacob


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===References:===
  1. http://g.msn.com/8HMJENUS/2737