Callies Ultra billet crankshafts are machined from either EN30B or 4330VM steel. This high quality specialty steel has been formulated to create a level of toughness that is unmatched in the crankshaft industry. We have billet crankshafts for small block Chevy, big block Chevy, small block Ford, LS1, and Mopar engines. Any main journal, rod journal, post configuration, stroke or other specialized characteristic that you may require can be provided. Callies Ultra Billet crankshafts are truly custom made to match your project.