LS Apex 4340 Forged Crank 3.625 Stroke

The LS Apex 4340 Forged Crank 3.625 Stroke is designed for serious LS engine builders who require reliability at high RPMs and boost levels. This crankshaft is suitable for high-performance street and racing applications, including naturally aspirated engines reaching over 10,000 RPM and turbocharged or supercharged builds producing more than 1,500 horsepower. It provides the structural integrity necessary for competition engines and modified daily drivers alike.

Constructed from high-quality 4340 forged steel, this crankshaft is designed to resist fatigue failure and maintain dimensional stability under extreme loads. The 3.625-inch stroke is optimized for compatibility with LS engine platforms, although specific applications may require careful consideration for integration. The forging process enhances the material's grain structure, leading to superior tensile and yield strength compared to cast iron alternatives.

Engine builders focusing on forced induction upgrades, big-displacement stroker builds, and racing applications will find this crankshaft indispensable. Its precision machining ensures tight tolerances on all journals and bearing surfaces, which is critical for balancing accuracy and minimizing vibration at high engine speeds. This crankshaft is an excellent choice for those looking to push the limits of their LS engines.