The standard cast crankshaft is suitable for high performance applications that will not exceed 7700 rpm.
An upgraded crankshaft is required for racing use or when sustained engine rpm exceeds 7700 rpm. Cosworth billet steel crankshafts are machined from superior EN40B and nitrited for maximum strength.
Each billet steel crankshaft is machined to precise tolerances with a light weight profile. Additionally, a keyway is machined to locate the chain sprocket and pulley.