why have them sleeved when brand new high quality units are avail from , kanter, vintageamerican, roberts, and others. its not that technical buy em new and youll be good. why fix old junk ! ! its a basic hydraulic system with smooth bores and new rubber your good to go. every other part that you install on your car today is from overseas, what good is it to have rebuilt cylinders with new made in china brake shoes and flex rubber hoses? buy em new and dont waiste your time , your brake shoes need to be high quality as that is what stops the car! this is coming from years experience as a hydraulic press mechanic. not to mention the when they sleeve the new units they use a chine sleeve and chinese rubber since that is all that is available. NO PARTS ARE MADE IN THIS COUNTRY ANYMORE! !!!!!!!!!!!!!!