| Noun | 1. | exhaust system - system consisting of the parts of an engine through which burned gases or steam are discharged automobile engine - the engine that propels an automobile exhaust manifold - a manifold that receives exhaust gases from the cylinders and conducts them to the exhaust pipe exhaust pipe - a pipe through which burned gases travel from the exhaust manifold to the muffler exhaust valve - a valve through which burned gases from a cylinder escape into the exhaust manifold muffler, silencer - a tubular acoustic device inserted in the exhaust system that is designed to reduce noise system - instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity; "he bought a new stereo system"; "the system consists of a motor and a small computer" tailpipe - a pipe carrying fumes from the muffler to the rear of a car |