Manley Performance 4340 Forged Crankshaft with 58 Tooth Reluctor Wheel

Chrysler 5.7L / 6.1L HEMI V8 Engines

191858

Overview:

The Manley Performance 4340 Forged Crankshaft is engineered specifically for Chrysler 5.7L and 6.1L HEMI V8 engines, delivering a robust foundation for high-performance builds. Crafted from premium 4340 alloy steel, this crankshaft is designed to withstand the rigors of increased power and aggressive driving conditions.

Ideal for enthusiasts and professional builders alike, this crankshaft supports enhanced engine durability and reliability while maintaining precise balance and smooth operation. Whether you are upgrading for street performance, track use, or heavy-duty applications, this forged crankshaft provides the strength and quality you need to maximize your engine’s potential.

Key Features:

Manley’s Pro Series 4340 crankshafts incorporate advanced materials and manufacturing techniques to ensure superior performance and longevity. Key features include:

• Constructed from high-strength 4340 alloy steel for exceptional toughness and fatigue resistance.
• Precision forged to exacting tolerances for optimal balance and smooth engine operation.
• Includes a 58 tooth reluctor wheel compatible with factory ignition and timing systems.
• Designed with a 4.050-inch stroke to fit Chrysler 5.7L and 6.1L HEMI engines.
• Ideal for high-performance and racing applications requiring increased strength over stock components.
• Compatible with a wide range of domestic engine builds and aftermarket components.
• Manufactured under strict quality control standards to ensure consistent performance and reliability.

Construction & Design:

This crankshaft is forged from premium 4340 alloy steel, a material known for its excellent strength-to-weight ratio and resistance to wear and fatigue. The forging process enhances the grain structure of the steel, resulting in a component that can endure high RPMs and increased power levels without failure.

The integrated 58 tooth reluctor wheel is precisely machined and balanced with the crankshaft, ensuring accurate engine timing and 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 stock crankshafts.

Installation & Fitment:

The Manley 4340 Forged Crankshaft is designed as a direct replacement for Chrysler 5.7L and 6.1L HEMI engines. It fits using factory mounting points and requires 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. No cutting, drilling, or special tuning is required for fitment with compatible engine builds.

• Direct fit for Chrysler 5.7L and 6.1L HEMI engines
• Uses factory mounting points and hardware
• No modifications necessary for installation

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 and 6.1L 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.