A collection of pipes, silencers, sensors and catalysts or filters that make a system to channel the waste exhaust gases away from an internal combustion engine.
- The exhaust valve opens into a port in the cylinder head that transports exhaust gas to the exhaust manifold.
- The manifold normally consists of a set of primaries, one for each cylinder.
- Primaries collect together into secondary pipes and then into the main exhaust pipe.
- At this point a catalyst or filter is used to clean up the exhaust gas.
- Exhaust silencers are used to attenuate the acoustic noise.
- Further ducts allow the exhaust gas to be transported to an exit point, the exhaust tailpipe.
There are different forms of exhaust system depending on the type of engine and the application.