Eagle Forged 4340 Steel Crankshaft

Chrysler / Dodge / Jeep / Ram 5.7L Hemi, 6.1L SRT8, 6.4L 392, 6.2L Hellcat & Trackhawk

439340506125

Overview:

The Eagle Forged 4340 Steel Crankshaft is a premium replacement crankshaft engineered for high-performance Chrysler, Dodge, Jeep, and Ram engines. Designed specifically for the 5.7L Hemi, 6.1L SRT8, 6.4L 392, and 6.2L Hellcat & Trackhawk powerplants, this crankshaft offers exceptional strength and durability for enthusiasts seeking reliable power delivery and engine longevity. Whether you are rebuilding your engine or upgrading for increased performance, this crankshaft provides a solid foundation for your build.

Built to meet the rigorous demands of street and track applications, the Eagle forged crankshaft ensures precise balance and smooth operation. It is ideal for engine builders and performance enthusiasts who require a dependable component capable of handling increased horsepower and torque loads.

Key Features:

This crankshaft combines advanced materials and design features to deliver superior performance and reliability:

• Constructed from forged 4340 steel for maximum strength and fatigue resistance
• Engine stroke of 4.050 inches, matching factory specifications for proper fitment
• Internal engine balance for smooth operation and reduced vibration
• Standard crankshaft snout style compatible with OEM components
• 58-tooth, 1-piece reluctor wheel for accurate engine timing signals
• Requires narrow bearings for proper clearance and fit
• Rod journal diameter of 2.000 inches and main journal diameter of 2.559 inches
• Sold individually with no rod or main bearings included, allowing customization
• Designed for direct fitment in multiple Chrysler and Dodge high-performance engines

Construction & Design:

The crankshaft is precision forged from 4340 steel, a high-grade alloy known for its excellent tensile strength and toughness. This material choice ensures the crankshaft can withstand the extreme stresses generated by high-performance engines without compromising durability. The forging process enhances the internal grain structure, providing superior resistance to fatigue and wear compared to cast or billet alternatives.

Its internal balance design optimizes engine smoothness by reducing vibrations, which contributes to longer engine life and improved drivability. The 1-piece reluctor wheel is integrated into the crankshaft, maintaining accurate engine timing signals essential for modern ignition and fuel injection systems.

Installation & Fitment:

The Eagle Forged 4340 Steel Crankshaft is engineered for direct replacement in Chrysler, Dodge, Jeep, and Ram engines equipped with 5.7L Hemi, 6.1L SRT8, 6.4L 392, and 6.2L Hellcat & Trackhawk powerplants. Installation requires the use of narrow bearings, which are not included, so ensure proper bearing selection for your build. Rod bearings are also not included, allowing you to select bearings that match your specific application and performance goals.

Professional installation is recommended to ensure correct torque specifications and clearances are met. This crankshaft maintains OEM dimensions, so no modifications to the engine block or other components are typically necessary.

What's Included:

• One Eagle Forged 4340 Steel Crankshaft
• Mechanical and electrical failure coverage plan

Ideal For:

This crankshaft is ideal for engine builders, performance enthusiasts, and racers who demand a durable, high-strength crankshaft for their Chrysler or Dodge Hemi and SRT engines. It suits applications ranging from street performance upgrades to track and racing builds where reliability under high stress is critical. Its compatibility with multiple engine sizes makes it a versatile choice for various high-performance projects.

Eagle Specialty Products manufactures high-strength engine components—most notably connecting rods and crankshafts—intended for performance and racing engines. These rotating-assembly upgrades are commonly used in builds that demand higher strength margins for boost, nitrous, sustained RPM, or competition use.