What effect do Yella Terras have over stockrockers on lifter pre-load? Is it less or more? I know the tolerances cant be the same. If any ones checked this what were your results? Any info would be great. Jason

 

They change the preload, but the kit comes with shims and instructions on how to adjust it for stock lifters.

 

Im using comp Rs on new H/C set up and Iam trying to figure out how much the YTs will affect the pre load and if it was more or less. Im already gonna use shorter push rods for less pre load. Im just trying to get in the ball park.