Well when it came from the factory yes. If it does not have a cat now, that would be illegal if caught. If it did not now have a muffler, I suspect all the neighbors would know that by now too!
cant repair a Catalytic converter only replace at a muffler shop
1990 was the last year Chevrolet made Celebrities. If you mean catalytic converter they look like a muffler, some have bolt on flanges.
Catalytic converter plugged?
YES IT DOES. Yes it does.
Its welded.
Yes.
If a catalytic converter is indeed bad, it's far more cost-effective to replace it rather than try to repair it
Your catalytic converter is at the top of your motor at the exhaust manifold take out the 4 14mm screws that connect your converter to your manifold drop down out the bottom of engine and replace another really simple fix
In the main exhaust pipe just under the front passenger seat
Chevy dealer, auto parts store, etc.
In the exhaust pipe in front of the catalytic converter...close to engine in crossover pipe
I am sure this would be possible, but it would no longer be legal to drive.