Warm air intake

A warm air intake (WAI) also known as a hot air intake (HAI), is a system to decrease the amount of the air going into a car for the purpose of increasing the fuel economy of the internal-combustion engine. This term is sometimes used erroneously to refer to a short ram air intake, which is another engine modification that aims to improve power output by increasing the static air pressure inside the intake manifold. rdf:langString