SKU: EAG334640016100
UPC: 793348546346
MPN: 334640016100
The GM LS 4340 Steel Crank 4.000 Stroke 24X Reluctor is a precision-engineered crankshaft designed for builders, engine shops, and performance enthusiasts working with General Motors LS-series engine platforms. This billet steel crankshaft serves as the backbone of any LS engine build, converting reciprocating piston motion into rotational power with exceptional durability and reliability. Whether you're restoring a classic, building a high-performance street engine, or creating a track-focused powerplant, this crankshaft delivers the foundation required for long-term engine integrity.
Manufactured from premium 4340 billet steel, the GM LS 4340 Steel Crank features a robust 4.000-inch stroke that influences displacement and powerband characteristics across LS engine variants. The internal balance design eliminates the need for external counterweights, streamlining installation and reducing rotating mass complexity. The 24X reluctor ring provides precise crankshaft position feedback to the engine control module, ensuring accurate fuel injection timing and spark advance in both stock and modified applications. The single-piece rear seal design simplifies assembly and reduces potential leak points, while the billet construction resists fatigue and cracking under extreme load conditions.
Engine builders and LS platform specialists rely on this crankshaft for naturally aspirated, supercharged, and turbocharged builds where reliability cannot be compromised. The 4.000-inch stroke pairs effectively with standard LS bore sizes to achieve common displacement targets while maintaining optimal rod-to-stroke ratios for efficient combustion and reduced side-load wear. At 62.4 pounds, this crankshaft suits both stock and custom rotating assemblies. Installation requires proper clearance verification, precision balancing, and correct torque specifications per manufacturer guidelines—making this an ideal core component for professional engine shops and serious DIY builders committed to LS engine excellence.
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