Callies Ford 7.3L Godzilla Magnum Crankshaft

Building serious power on the 7.3L Godzilla platform starts at the bottom end, and Callies delivers a purpose-built foundation with the Magnum crankshaft. Machined from premium SAE 4340 steel forgings and subjected to multiple heat treatments including Callies' proprietary Ultra-Case process, this crankshaft handles everything from a hot rod street build to an all-out drag racing application in the 7.3L Godzilla from the 2020-2026 Ford F-250 and F-350 Super Duty. Stroke options ranging from 3.840 inches to 4.600 inches give builders the flexibility to tailor displacement to their exact combination, with several rod journal sizes available to match.

4340 steel with Ultra-Case heat treatment. Callies starts with a high-quality 4340 forging and runs it through multiple heat treatments, producing wear and strength characteristics that have made the Magnum line a benchmark in competition crankshaft manufacturing. The Ultra-Case process hardens critical surfaces while maintaining core toughness, so the crank survives sustained high-load use without sacrificing fatigue resistance.

Mass Correct counterweighting reduces bearing stress across the full shaft. Many crankshafts address imbalance only at the outboard main bearings. Callies positions the Magnum's counterweights strategically along the entire length of the shaft, reducing imbalance forces at every main bearing location. The result is extended bearing life and reduced wear under competition conditions.

Gun-drilled mains and lightened rod throws on every unit. Gun-drilled main journals reduce rotating mass without compromising journal integrity, and rod throws are lightened to further improve the strength-to-weight ratio. Every Magnum crankshaft ships with fully profiled counterweights and gun-drilled mains as standard, regardless of stroke or journal configuration.

Multiple stroke and rod journal configurations in one platform. Available in 3.840/2.200, 3.976/2.086, 4.125/2.100, 4.375/2.100, 4.500/2.100, and 4.600/2.100 stroke/rod journal combinations, the Magnum accommodates a wide range of connecting rod choices and target displacements.

Product Benefits

• SAE 4340 Forged Steel: High-strength base material provides the foundation for competition-level durability.
• Ultra-Case Heat Treatment: Callies' proprietary multi-step process maximizes surface hardness and core toughness.
• Mass Correct Counterweights: Strategically placed counterweights reduce bearing load across the full shaft length, extending bearing life.
• Gun-Drilled Mains: Standard on every unit; reduces rotating mass at the main journals.
• Lightened Rod Throws: Improved strength-to-weight ratio for enhanced fatigue resistance under high-cycle loads.
• Wide Stroke Range: Available from 3.840 to 4.600 inches to suit stock-displacement replacement or stroker builds.
• Multiple Rod Journal Sizes: Accommodates a variety of connecting rod choices for maximum build flexibility.
• USA Manufactured: Produced domestically to Callies' in-house specifications.
• Broad Application Range: Suitable for stock replacement, street performance, and ultra-high-output drag racing on the 7.3L Godzilla platform.

Note: Fits the 7.3L Godzilla found in the 2020-2026 Ford F-250 and F-350 Super Duty. Select your desired stroke/rod journal/rod length combination (4.600/2.100/6.350, 3.976/2.086/6.300, 4.375/2.100/6.350, 4.500/2.100/6.300, 4.125/2.100/6.300, or 3.840/2.200/6.300) at the time of order. Main journal diameter is 2.657 inches. Verify dimensions are compatible with your build before ordering.

About Callies: Callies Performance Products specializes in high-strength rotating assembly components, with the Magnum crankshaft line standing as one of the most recognized competition crankshafts in domestic performance racing. Callies manufactures its crankshafts in the USA using in-house forgings and proprietary heat treatment processes, supplying engine builders across drag racing, circle track, and high-performance street applications.

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