It is the wings shape that generates lift not the VG's.
As the video demonstrates the VG's keep the air attached to the wing.
less throttle is needed for the same speed.
A proven flow enhancer.
It is a airflow enhancer on the plane as it is on the Lancer Evolution.
The obvious place to mount them on a car is before the air detaches off the rear roof, to cause the air to leave in a determined straight flow,less flutter from the air detaching off the car.
