For aerodynamic purposes there is also a rear diffuser. (thesupercars.org)
Just to note a few, the carbon, three - piece rear diffuser, rear - wing and hanch mounted air - outlets all add an air of aggression to the exterior, simultaneously serving a functional aerodynamic purpose too. (evo.co.uk)
Even more important, they also fulfill aerodynamic purposes. (drivemag.com)