The combustion cycle involves pulling an air/fuel mixture into the cylinder head through the intake valves, igniting the mixture, and then expelling it out the exhaust valves. At the exhaust…

The EGR valve allows a certain amount of exhaust gases to circulate from the exhaust side to the intake side. The inert, oxygen-depleted exhaust gases are used to cool the…

Front-wheel drive vehicles and most all-wheel-drive vehicles use a flex pipe in the exhaust system. The flex pipe is necessary to allow the fore and aft rocking of a transverse…

The exhaust manifold is the outlet from the engine. It lets spent exhaust gasses exit the engine while also collecting them together to send them down the exhaust piping and…

The catalytic converter is a part of the exhaust system that is located after the exhaust manifold and before the muffler. The active part of a catalytic converter is a…

As an engine runs, it pushes the exhaust gases out through the exhaust valves into the exhaust manifold and down through the exhaust to the muffler. The muffler quiets the…