Two new 4.250” Crank Shafts is now ready to use. The material is Uddeholm Deivar which has excellent toughness and ductility in all directions. This material also has many other properties that makes it a excellent choice for high quality crankshafts. After ruff machining it is hardened to 45 HRC then fine machined on all surfaces and grinded. The final step is a Plasma Nitride finish and then hand polishing.