[Dave Rifkin]

Please don't take this the wrong way, I think your work is very nice but, my problem with what you've shown is that the cars look like charicatures of a Camaro. The details appear out of proportion for the car itself; the scoop, the wheels, the spoiler; etc. look too big for the body of the car.
I feel the same way about the manufacturers offerings; there's no overhang and the cars have such tall, flat sides that they almost look like something being viewed in a fun house mirror.

I think your designs would look much better if you toned down some of the add ons and made the car blend more; make these items appear like they belong instead of afterthoughts.