The mechanic shop said I need catalytic converters. Can someone tell me how many my car has and which ones I need.

 

There are fourteen on that particular chassis... but you will only need to replace ONE. The one that you will need to replace could be part of the exhaust manifold and bolted directly to the cylinder head, OR it could be found at the rear most end of the exhaust pipe that connects to the exhaust manifold just in front of the engine and turns approximately 90' and passes under the oil pan toward the rear of the car.