APR Performance Mustang Rear Diffuser (2005-2009)

This APR Performance Mustang S197 Rear Diffuser works in unison with other aerodynamic components of a car to enhance downforce. Since air is displaced as the car moves forward, the air molecules in the rear of the car get disrupted causing a vacuum of low pressure air. This rear diffuser ultimately corrects that and allows your vehicle to power forward without drag.