I bought LS4 4pot calipers a few months after purchasing my GS3 and it has been on the back burner since building my race car. I finally decided to get the needed RCA's only to find out Mike had a new version. Mike assured me they were just as good as the originals just at a better cost, so with all concerns put to ease. I made the purchase!!!
What I received was well packaged.
The installation was straight forward. Jack the car up, remove front wheels and remove the stock 17mm bolts that hold the LBJ to the bottom of the spindle. I am running after market LBJ's so this may have been the reason but I had to remove the powder coating on the insert where the sleeve of the LBJ slides together with the spacer. It was very simple. Dremel with a small wire brush removed the powder coat and gave the needed clearance. Now I just need to buy some rotors and pads, then install.