Thanks sporkafifa for confirming what I think. I didn't set up this thread to start an argument on what a diffuser is. I just want to know wich cars I can put a diffuser on.
A diffuser, in an automotive context, is a shaped section of the car underbody which improves the car's aerodynamic properties by enhancing the transition between the high-velocity airflow underneath the car and the much slower freestream airflow of the ambient atmosphere.
