Callies APO31W-MG24XB - 4.000" Stroke Magnum LS Crankshaft with Billet 24x Reluctor

Description

Callies Magnum LS crankshafts are engineered for serious competitive racing, setting the standard for lightweight strength and structural rigidity in high-horsepower LS applications. Featuring Callies' proprietary Ultra Case deep nitride heat treatment, the Magnum series offers superior fatigue resistance and journal surface longevity under intense thermal and mechanical stress. Every Magnum shaft is manufactured with gun-drilled main journals and extensively lightened rod journals, bringing the average weight down to an agile ~47 lbs to maximize throttle response without sacrificing core integrity. Fitted with an upgraded billet steel 24x reluctor wheel and prepped for straightforward balancing, this 4.000" stroke crankshaft provides an elite foundation for high-RPM and power-adder LS stroker builds.

Features:

• Treated with Callies' proprietary Ultra Case deep nitride process for maximum wear resistance and core fatigue strength
• Upgraded with a precision CNC-machined billet steel 24-tooth (24x) reluctor wheel for superior timing reliability and durability
• Popular 4.000" stroke length ideal for 383ci, 408ci, 416ci, and 427ci LS stroker applications
• Gun-drilled main journals significantly reduce rotating mass and assist internal crankcase air scavenging
• All rod journals precision lightened to minimize rotational inertia and deliver rapid engine acceleration
• Counterweights profiled and prepped for a standard 1785g bobweight to simplify final balancing
• Dual linear post keyways on the snout provide positive lock-up for aftermarket harmonic dampers and crank-driven superchargers