Eagle Forged 4340 Steel Crankshaft

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

439240506125

Overview:

The Eagle Forged 4340 Steel Crankshaft is a high-performance replacement crankshaft engineered for a wide range of Chrysler, Dodge, Jeep, and Ram vehicles equipped with Hemi engines from 5.7L to 6.4L, including the 6.1L SRT8, 6.4L 392, and the 6.2L Hellcat and Trackhawk models. Designed for enthusiasts and professional builders seeking durability and reliability, this crankshaft offers a robust foundation for engine builds that demand strength and precision.

Whether you are rebuilding a stock engine or upgrading for increased power and longevity, this crankshaft provides the necessary strength to handle high horsepower and torque applications. Its forged 4340 steel construction ensures superior toughness and resistance to fatigue, making it ideal for street performance, racing, or heavy-duty use.

Key Features:

This crankshaft combines advanced materials and precise engineering to deliver consistent performance and durability. Key features include:

• Engine stroke of 4.050 inches for optimal displacement and power potential
• Manufactured from forged 4340 steel for exceptional strength and fatigue resistance
• Internal engine balance for smooth operation and reduced vibrations
• Standard 1-piece rear main seal style for reliable sealing and ease of installation
• 32-tooth reluctor wheel compatible with factory ignition systems
• Requires narrow bearings to fit properly in the engine block
• Standard crankshaft snout style for compatibility with OEM and aftermarket components
• Rod journal diameter of 2.000 inches and main journal diameter of 2.559 inches for precise bearing fitment
• Sold individually, allowing for custom engine builds and replacements

Construction & Design:

The crankshaft is crafted from premium forged 4340 steel, a material known for its high tensile strength and toughness. Forging enhances the grain structure of the steel, resulting in a component that withstands the extreme stresses of high-performance engines. The internal balance design reduces harmonic vibrations, contributing to engine longevity and smoother operation at all RPM ranges.

The crankshaft features a standard snout and a 1-piece rear main seal style, ensuring compatibility with a wide range of factory and aftermarket parts. Its journals are machined to exacting tolerances to accommodate narrow bearings, which are required for proper fitment in these Hemi engines.

Installation & Fitment:

This crankshaft is designed to fit most Chrysler, Dodge, Jeep, and Ram vehicles equipped with 5.7L Hemi, 6.1L SRT8, 6.4L 392, and 6.2L Hellcat & Trackhawk engines. Installation requires the use of narrow bearings, which are not included, so ensure you have the correct bearings for your application. Rod bearings are also not included and must be sourced separately.

Installation should be performed by a qualified engine builder or mechanic familiar with high-performance engine assembly to guarantee proper clearances and torque specifications. This crankshaft is sold individually, allowing for flexible use in custom engine builds or replacements.

What's Included:

• One forged 4340 steel crankshaft
• Mechanical and electrical failure coverage plan

Ideal For:

This crankshaft is ideal for performance enthusiasts, engine builders, and racers who require a durable, high-strength crankshaft for Chrysler, Dodge, Jeep, and Ram Hemi engines. It suits applications ranging from street performance upgrades to serious track and drag racing builds, providing a reliable foundation for increased power and engine longevity.

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.