What is the function of an exhaust manifold?

The function of an exhaust manifold is to collect exhaust gases from the engine cylinders and channel them into the exhaust system. It is typically made of cast iron or stainless steel and is designed to withstand high temperatures generated during combustion. When the engine runs, exhaust gases are produced in the combustion chamber of each cylinder. The exhaust manifold captures these gases as they exit the cylinders and directs them through the rest of the exhaust system, which may include components like the catalytic converter and muffler.

This collection and routing of exhaust gases is crucial for effective engine operation, helping to ensure that the emissions are properly managed and that the engine performs efficiently. By efficiently handling these gases, the exhaust manifold also contributes to overall engine performance and emissions control.

The other functions listed, such as reducing exhaust noise, mixing air and fuel, or controlling engine temperature, do not pertain to the primary role of the exhaust manifold, as those roles are managed by other components within the engine and exhaust system.