APR PERFORMANCE CARBON FIBER PORSCHE GT4 REAR DIFFUSER
The APR GT4 carbon fiber diffuser works in conjunction with other aerodynamic components of the car (principally the under tray and rear wing) to help produce downforce. 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.
The diffuser channels the high speed air flow coming from underneath the car, redirecting it to transition smoothly transition into that low pressure vacuum. This encourages smoother air flow underneath the car, increasing performance from other aerodynamic components such as the rear aerodynamic wing.