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Billet and Forged Crankshafts for the Mitsubishi 4G63 are now available from Callies Performance Products. These 4340 material crankshafts are metalurgically and geometrically certified to the same quality standard of all Compstar by Callies crankshafts. These 4G63 crankshafts feature Twin Shot rod journal oiling and are available with race proven Aeroshed super finishing.