Diffuser

A diffuser is an aerodynamic component located at the rear underside of a race car that manages airflow to generate downforce without significantly increasing drag.

Working on the principle of pressure differential, the diffuser features an expanding channel that allows air flowing beneath the car to decelerate and return to atmospheric pressure. This creates a low-pressure area under the vehicle, effectively sucking it to the track while improving stability at high speeds.

Modern race cars in Formula 1, sports car racing, and even production performance vehicles utilize diffusers of varying complexity. Their effectiveness is often enhanced by complementary aerodynamic elements like splitters and side skirts, which help channel air properly to the diffuser.