Used to align oil hole from crankcase to tappet blockCan also be used to align rocker box bases on Evolution head (requires two tools)Also used in Harley-Davidson® Twin Cam oil pump alignment...
Perform like a hydraulic tappet up to 5500 rpm, then turn into a solid tappetWhen they turn into solid tappets, it adds approximately three to six more usable horsepowerPrevent hydraulic pump at high...