Super Snake wheels will not fit on my GT500?

Hello Shelby Family,
I am a new member and I own a 2012 GT500.
I bought a set of 12 Shelby Super Snake Alcoa 20inch wheels. The problem is they don't fit. They stick out past the wheel well. When I bought the car, it had a Shelby brake kit and a stage 2 suspension. I am including a picture of the hub and the brake set up. The brakes are Shelby 6S (Baer symbol). Is this a spacer or part of the caliper? I think it has way too many bolts in it to be a spacer. any Help

Tried to post a picture but it will not post it?