I switched cams and went from a billet cam to a cast cam, so i don't need this gear. It probably has 10k miles on it and is still in great shape. Its the .427 size gear and i bought it from BRE. Its still mounted on my old distributor drive shaft but there is a crack near the mounting bolt hole. A person should probably swap the gear to their distributor drive shaft. This is needed if you have a billet cam, $30 shipped.