The diffuser is the flared opening at the rear of the The floor or the undertray (underbody) is the highly complex component that tunnels air under the car creating downforce. This... There's more... and is used to generate Downforce is a measure of how much vertical aerodynamic load is created by a Formula 1 car’s aerodynamic surfaces. The... There's more.... Air is accelerated under the car and as it passes through the openings of the diffuser it creates lower pressure, pulling the car down.
It is an intricate part of the car’s floor and the car’s overall Aerodynamics is the science of controlling how the air behaves as the car cuts through it at speed. F1 cars... There's more... strategy.