APR Performance Rear Diffuser 2020+ Toyota SupraTo help channel the high speed air flow coming from underneath the car, diffusers redirect the high speed air flow to transition smoothly transition into the low pressure vacuum in the rear. This encourages a smoother flowing air flow underneath the car and allows better performance from other aerodynamic components such as aerodynamic wings. Diffusers work in conjunction with other aerodynamic components of a car to help produce downforce. Because a