These cast crankshafts are designed after our custom billets and made from SCAT’s exclusive space-age 9000 material. They are precision ground and micropolished. Crankshaft Series:Series 9000. Lightening holes in all rod throws Stress-relieved and shot-peened Precision ground and micropolished Available with many different rod, main and stroke combinations Exclusive space-age 9000 material that is stronger than O.E.M. cast Designed after our custom billets.