Turbo96- Do you know that for a fact, or is that just your opinion?

I honestly can't really tell... I thought they were photoshopped because of how opaque and uniform the color of the brake rotors are.

 

I think he was referring to what is now known as the First Camaro Concept, which is the third car in order of those four photos.

Photo 1 is the clay of the final concept, Photo 2 is the concept, Photo 3 is the first more retro concept, and Photo 4 is the second design study clay (two different sides) which was developed by the second design team brought in later because the first concept was too retro and later refined to the clay version in Photo 1. (So there actually were two sport bikes. )

At least that's my understanding of it.