So you had the originals and bought some at autozone and gave them the cores? how much did you pay for the calipers? Is there anyone that sells a rebuilt kit for them? why did you pop the races off the rotors, were they different from the ones that come with the Timken bearings? over all do you regret going with the 4 piston set up ? how are the brakes working for you ? thanks these will be the last questions