Crower's proprietary premium grade USA Made 4340 "Non-Twist" Forging is the foundation for this crankshaft. This is the same Premium forging that is use to make their Maxi-Light and Ultra-Light crankshafts. The Crower “Standard” crankshaft is fully hand de-burred and all surfaces are smooth to the touch. This crankshaft features include 1/8 radii, premium heat treat processes, counter weight correct design and straight shot oiling. This design comes standard with lightening holes in all rod journals. This crankshaft can be ordered with or without center counter weights to suit your application. All rod & main sizes are standard unless otherwise specified. Specify rod length for proper counterweight clearance. Gun drilled Mains, Knife Edge and Balancing available for an extra fee.