Ski 61701

I must say these stage IV are everything but perfect. During the years they have been milled , massaged, machined, and the tip of valve stems actually are not lined because of recessed valves after grinding...this is the reason of adjustable rockers. Before putting this (damn) high energy highlift cam I had the original ( worn) stamped rockers and I had no issues about valvetrain noise, nevertheless the preload on most of hydraulic lifters excedeed the standard value and it was very dangerous with engine revving because of possible hug between valve and piston with lifter pumping-up... sorry I read your reply so late.