just looking to see what you guys think.i don't know much about brakes so i called the tech department the other day to see what they recommend for a master cly for my power brake set up.i have them front and back four pistons on all corners.they said to use an 1-1/8 bore clynder.i'm thinking about calling them back before making the purchase,i've never ?ed a tech line before but the guy seemed to quick to get off the phone with me. thoughts?