I’m going to be using one in an upcoming build thats quite larger then most use. (259/261 at 50. .649 lift) Went with it because I already had good quality slow leak down lifters that can take higher spring pressures. With the right selection of spring, retainer, rocker geometry, and lifter I think they can make great power up to 7000. I speced it all through bullet and they agreed. In the end a solid roller is probably just easier and more efficient to use. However for a bracket build maybe long term less spring pressure and softer closing rate will give longer life on valve seats?
