Q: Q: Is my Catalytic Converter bad?

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Last week the sharp rattling noises began. Mechanic diagnosed bad Cats...

Waiting for weld shop to get new cats in and didn't drive the car. Today I drove to work and there was zero noises...

Taking car to shop tomorrow but need to know if this is normal for the rattling to just stop...

Btw, performance seems normal during all the noise/no noise the past six days...

My car has 49000 miles.
My car has a manual transmission.

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