Manley Performance Forged Crankshaft

2009–2012 Chrysler 300, Dodge Challenger, Dodge Charger, Dodge Magnum, Jeep Grand Cherokee 5.7L / 6.1L HEMI & 2011–2012 Chrysler 300, Dodge Challenger, Dodge Charger 6.4L 392 HEMI

Part #: 191858

Overview

The Manley Performance 4340 Forged Crankshaft is a high-strength replacement designed specifically for Chrysler 5.7L, 6.1L, and 6.4L HEMI V8 engines. Built to endure the demands of high-performance and racing applications, this crankshaft offers enhanced durability and reliability over stock components. It provides a solid foundation for engine builds that require increased power handling and longevity, making it an excellent choice for enthusiasts and professional engine builders alike.

Whether upgrading for street performance, track competition, or heavy-duty use, this forged crankshaft ensures smooth operation and precise engine timing thanks to its integrated 58-tooth reluctor wheel. It is engineered to fit directly into compatible Chrysler and Dodge HEMI engines without the need for modifications.

Key Features

Manley’s Pro Series forged crankshafts are crafted with advanced materials and manufacturing processes to deliver superior performance and durability. Key features include:

• Constructed from premium 4340 alloy steel for exceptional toughness and fatigue resistance
• Precision forged to exacting tolerances for optimal balance and smooth engine operation
• Integrated 58-tooth reluctor wheel compatible with factory ignition and timing systems
• 4.050-inch stroke designed specifically for Chrysler 5.7L, 6.1L, and 6.4L HEMI engines
• Ideal for high-performance, racing, and heavy-duty applications requiring increased crankshaft strength
• Direct bolt-in replacement using factory mounting points and hardware
• Manufactured under strict quality control standards to ensure consistent reliability
• Compatible with a wide range of domestic engine builds and aftermarket components

Construction & Design

This crankshaft is forged from high-grade 4340 alloy steel, known for its excellent strength-to-weight ratio and resistance to wear and fatigue. The forging process refines the grain structure of the steel, resulting in a component capable of withstanding high RPMs and elevated power levels without failure.

The integrated 58-tooth reluctor wheel is precisely machined and balanced with the crankshaft to maintain accurate engine timing and seamless compatibility with factory electronic ignition systems. The 4.050-inch stroke dimension is optimized for Chrysler HEMI engines, providing a reliable fitment and performance upgrade over OEM crankshafts.

Installation & Fitment

The Manley 4340 Forged Crankshaft is designed as a direct replacement for Chrysler 5.7L, 6.1L, and 6.4L HEMI engines from 2009 to 2012. It installs using factory mounting points and hardware, requiring no modifications to the engine block or ancillary components. Installation should be performed by a qualified engine builder or mechanic to ensure proper clearances and assembly procedures are followed.

What's Included

• One Manley 4340 forged crankshaft with 4.050-inch stroke
• Integrated 58-tooth reluctor wheel installed

Ideal For

• Performance enthusiasts upgrading Chrysler HEMI engines for increased power and durability
• Engine builders assembling high-performance or racing 5.7L, 6.1L, and 6.4L HEMI V8s
• Street and track applications requiring a stronger, more reliable crankshaft
• Rebuilds where OEM crankshaft strength is insufficient for intended use

Manley Performance manufactures high-strength engine internals for serious builds—especially forged pistons, connecting rods, valves, and valvetrain components developed for racing and high-output street applications. If you’re building for boost, high compression, or sustained RPM, Manley is a common choice for parts engineered to take abuse and keep power reliable.