Diffusers work in conjunction with other aerodynamic components of a
car to help produce down force. Because a car displaces air as it moves
forward, the air molecules in the rear of the car get disrupted causing
a vacuum of low pressure air.
To help channel the high speed air flow coming from underneath the
car, diffusers redirects 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.
-Note- Some exhaust systems require trimming of the diffuser for proper installation.
