GM LS 4340 Forged Crank - 4.000 Stroke

The EAGLE GM LS 4340 Forged Crank with 4.000 Stroke is a premium rotating assembly component engineered for high-performance LS engine builds, particularly suited for street and strip applications. This crankshaft is essential for serious LS platform upgrades, efficiently converting piston reciprocation into usable horsepower while enduring extreme combustion pressures and inertial loads.

Constructed from 4340 Forged Steel, this crankshaft offers superior strength and fatigue resistance compared to ductile iron factory cranks. Its 4.000-inch stroke geometry enhances displacement and low-end torque, making it a versatile choice for custom engine combinations across the LS family. The forging process ensures the elimination of porosity and weak points, while precision balancing minimizes vibration, promoting engine longevity.

Ideal for engine builders and enthusiasts, this crankshaft is perfect for those tackling serious LS stroker projects where stock internals may not meet performance targets. Installation requires professional machine shop setup to ensure optimal performance and reliability in high-stress environments.