Which statement about the catalytic converter location is correct?

• A. It is located after the exhaust pipe
• B. It is located in the fuel tank
• C. It is located downstream of the exhaust manifold, before the exhaust pipe
• D. It is located inside the engine block

Answer: (C)

Catalytic converters must be in the exhaust stream after the engine’s exhaust manifold so the hot gases flow through the catalyst and pollutants are transformed before the exhaust exits the vehicle. This placement is downstream of the manifold and ahead of the rest of the exhaust piping, ensuring the catalytic reaction happens early in the exhaust path and at the right temperature. Placing it after the exhaust pipe would bypass it, and putting it in the fuel tank or inside the engine block would be physically impossible and unable to treat the exhaust gases at all.