The rear rotors came in. These are first gen Cadillac CTS-V front rotors. They are 355mm(14")
The first gen CTS-V was 6 lug for some reason. Even though it is a smaller 6 lug I can redrill them to the proper 6x5.5 easily.
The best part is they are very affordable at around $100 for the pair.
Here they are next to a cpp rotor.
I bolted together a rear link and link brackets for some inspiration to get the rear end done!