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Callies Magnum 351W Stroker CrankshaftMagnum crankshafts by Callies have established themselves as one of the most durable competition crankshafts ever produced. Magnum crankshafts are manufactured from ultra pure AISI 4340 steel. Callies then subjects this material to multiple heat treatments, resulting in a crankshaft with unsurpassed wear and strength characteristics. All Magnum cranks feature Callies Ultra-Case heat treatment. Each Magnum crank will have gun drilled mains and fully profiled counterweights, regardless of engine type. Various Strokes2.000" or 2.100" Rod Journal (Minimum rod length 6.200" on cranks 3.900" or larger)2.750" 351C Mains Fits 1 pc or 2 pc rear main blocks*Can be used in factory 351W blocks when using main bearing spacers Clevite MS2255SEMI*
