Those doodads on the red car look like canards to redirect downforce for stabilization at higher speeds. If that's the case, most definitely not FE friendly.
The rear fairings couldn't hurt but how much do they cost? Are they even puchasable entities? I never noticed the side and rear fairings on the Corolla S before but wow, there they are bigger than life.
Magnets.... I'm also looking for ways to attach without drilling. Adding that to my homework list.