The diffuser functions as an expansion chamber to manage the air when it exits from the underside of the car and re-enters the surrounding air at higher pressure.
Smoothing this reduces turbulence and drag behind the vehicle, improving the airflow underneath the car.
It gives the car a sporty character and better aerodynamics. It takes advantage of the airflow from the front of the vehicle and directs it downward and backward to reduce aerodynamic drag and increase grip.
It helps generate vertical downforce by accelerating the air beneath the car.
It is installed with double-sided adhesive tape on the rear bumper or with screws (not included).