Air gets trapped by the rear bumper and acts like a mini parachute. In theory it will help with any car w/o the proper underbody plastics to keep air from getting trapped inappropriately.
However, I believe the consensus is that Honda's owners are the only ones willing to mutilate their "street" car for another 1mph and 2 tenths.
:dumb: :dumb: :dumb: :dumb: