Overview 

The LS 4.000" forged steel crankshaft with a 58-tooth reluctor wheel is a robust, high-performance component designed for stroker LS engine builds seeking increased displacement and torque. Crafted from durable forged 4340 steel, it offers excellent strength and fatigue resistance under demanding conditions. The crankshaft features internal balancing to minimize vibrations and large .125″ radius fillets on the journals to reduce stress concentrations, enhancing reliability. Precision CNC grinding, micropolishing, and chamfered oil holes ensure smooth operation and optimal lubrication. The integrated 58-tooth reluctor wheel provides accurate crank position signals for modern engine management systems, supporting advanced tuning and performance. Multiple heat treatments, including nitriding, shot peening, and stress relief, improve surface hardness and wear resistance. Overall, this crankshaft is built for durability, precision, and high-RPM capability in performance LS engines.

Features

• 4.000" stroke for increased displacement and torque in LS stroker builds

• Forged 4340 steel construction for exceptional strength and durability

• Internally balanced to reduce engine vibrations and improve smoothness

• 58-tooth reluctor wheel integrated for precise crank position sensing compatible with modern LS engine management

• Large .125" radius fillets on journals to reduce stress and enhance durability

• Precision CNC grinding and micropolishing for tight tolerances and reduced friction

• Chamfered oil holes to improve oil flow and bearing lubrication

• Multi-stage heat treatments including nitriding, shot peening, and stress relief for superior fatigue resistance and wear protection

• Standard rod and main journal sizes (2.100" rod journals, 2.559" mains) for compatibility with OEM and aftermarket components

• Lightweight design (~50–54 lb) suitable for high-RPM, high-performance applications