LS Apex 4340 Forged Crank 4.125 Stroke

The LS Apex 4340 Forged Crank 4.125 Stroke is a premium performance component designed for high-displacement GM LS-series engine builds. This crankshaft provides the necessary foundation for racers and performance enthusiasts looking to increase torque and horsepower through a longer stroke length. By utilizing a 4.125-inch stroke, builders can significantly expand the cubic inch capacity of their LS blocks for competitive drag racing or high-performance street applications.

Engineered from high-strength 4340 forged steel, the LS Apex 4340 Forged Crank 4.125 Stroke offers superior fatigue resistance compared to cast alternatives. It features an internal balance design and comes equipped with a 58X reluctor wheel to ensure precise ignition timing and compatibility with modern electronic control units. The inclusion of a one-piece rear main seal design ensures a leak-free interface, while the Apex series geometry optimizes the strength-to-weight ratio for improved rotational dynamics.

This crankshaft is specifically tailored for GM LS-series engines requiring a robust rotating assembly that can withstand the stresses of increased cylinder pressure. Professional engine builders will find that the LS Apex 4340 Forged Crank 4.125 Stroke integrates seamlessly into blocks configured for long-stroke applications. Whether you are upgrading a naturally aspirated power plant or preparing a forced induction setup, this forged component delivers the reliability needed for extreme duty cycles.