The bronze gear is for a solid roller cam only. They are softer metal and they do wear so you have to replace them when they need it. Also when they get enough wear they can change you timing. You have to watchem.
It’s for any roller cam, hyd or solid. The roller cam is usually made from a billet piece of steel, wearing out a normal iron gear. Though I have seen some roller cams that had a iron gear pressed on a billet cam. I ran a bronze gear for over 10k Miles with minimal wear. It will only retard the ignition timing slightly over time, nothing You can’t handle.
