CTS-V Brakes on a 4th Gen.
#2
There was a thread about 18-24 months ago on here debating that exact thing. I can't remember the verdict, but I think that the calipers would work, but no one could find rotors that would both fit the car and the calipers. At least, no affordable rotors. The backspacing and outer diameters were such that there were no regular rotors that worked. You had to buy some kind of Wilwood or Baer 2-piece rotor that costs $600 for a pair. It kind of negated the attractiveness of cheap 4-piston CTS-V calipers.