CALLIES MAGNUM XL Crankshaft [STROKE 4.000 | PIN SIZE 2.000 | MAIN SIZE 2.559] (GM LS exc/ LS7)

For nearly 20 years, Magnum XL crankshafts have proven to be the most durable, best performing lightweight crankshafts available. Machined from ultra pure SAE 4340 steel, these lightweight crankshafts are capable of handling the high horsepower and RPM of today's most advanced engines.

Magnum XL lightening profiles result in crankshafts having extremely high strength to weight ratios. Material is carefully removed from non-stressed areas of each shaft eliminating parasitic material and weight. The Callies Magnum XL profile is exceptionally effective at minimizing windage within the crankcase atmosphere. Oil control is improved through the elimination of disruptive undercuts, resulting in smooth sided, free flowing counterweights. Each main and rod journal is drilled for weight reduction and throttle response improvement.

Magnum XL crankshafts are shipped fully balanced to your exact assembly weight without drilling. These crankshafts are available in many custom configurations. Your order will be processed specifically to meet your needs.

Our unique Magnum XL lightening profiles were developed to optimize material distribution for enhanced strength, superior bearing load reduction, and consistent balance.