I knew about active grille shutters, but the car which I'm looking for has another "active" solution...and I don't know exactly if it's aimed at enhancing downforce of reducing drag (or both)... by the way it was a low-med price car, so nothing extraordinary in terms of performances
I can't post images due to insufficient number of posts, but if you add "http:" to this //s21.postimg.org/y7f6064mv/Active_Aero.jpg
you can see what I mean.
Thanks however for the reply; I'll keep searching.