This was a factory roller lifter. I live about 30 miles north of Crower and have used many of their cams. In my rebuild I am uusing a regrind of a 6.1 billet cam, the regrind was done by Crower in Temecula. I don't know the family tree, but it is a blood relative of the founder. The lobe with the broken roller was the only one showing damage.