Which component in the exhaust system is attached to the cylinder head?

The component in the exhaust system that is attached to the cylinder head is the exhaust manifold. The exhaust manifold is designed to collect exhaust gases from multiple cylinders and direct them to the exhaust pipe. It is typically bolted directly to the cylinder head of the engine, making it the first component in the exhaust system after the combustion process occurs.

The design of the exhaust manifold plays a crucial role in efficiently channeling exhaust gases away from the engine, minimizing back pressure, and helping to improve overall engine performance. It often incorporates passageways to allow for the expulsion of gases from each cylinder while also sometimes integrating features to help reduce emissions, especially in systems that may have a built-in catalyst.

In contrast, other components like the exhaust pipe, catalytic converter, and muffler serve different functions within the exhaust system, such as connecting sections of the exhaust system, reducing harmful emissions, and quieting engine noise. They do not attach directly to the cylinder head, distinguishing the exhaust manifold's position and purpose within the system.