With Schubeck Flat Lifters you can forget everything you've ever learned about breaking in a flat lifter cam.  There is no break-in required; therefore, there is no difference between a new or used cam.  Just install the lifters with your race-ready springs and go to the races!

At a recent Performance Industry trade show an engine builder describing his "dyno" session said, "We tested 8 different cams on one set of your lifters, back to back", he explained, "What I did in four days with one set of your lifters, would have taken me about three weeks to do with the old break-in procedure.  They are ideal for any "dyno" shop because changing camshafts and making pulls immediately with race-ready springs, without concern for break-in, is money in the bank."