An instrument for measuring the constituent gases in the exhaust.

See Exhaust Gas Analyser.

An emission control system that uses an exhaust gas feed into the intake air stream to reduce the mass of oxygen in the air charge and limit the formation of harmful oxides.

Heat resisting ducting that connects the exhaust ports of an engine to an exhaust pipe.

Outlets in the cylinder head for the exhaust after the valve opens. In a two-stroke engine the ports are in the side of the cylinder.

The last stroke of the four stroke cycle when the burnt gases are expelled to the atmosphere.

An increase in size. For example, when a metal rod is heated it increases in length and diameter. Opposite of contraction.

Open muffler in the exhaust system to reduce the noise.

An inert, usually colourless and semi-transparent pigment used in paints to fortify and lower the price of pigment systems.

Usually describes an extra housing on the rear of a transmission gearbox.