Finally got the 4 pot CTS-V calipers installed behind my 18" stock rims. I can't wait to get new rubber to go on my 19" stock rims. I'm running 20mm spacers which pushed the wheels out to the edge of the fenders.
Did you grind off the nonthreaded part just for aesthetics?I need to bleed the brakes again as the pedal is softer than with the stock brakes. I have stock studs. I just used an angle grinder to cut off the nonthreaded tips of the studs.