GM LS Billet Crankshaft 4.000 Stroke w/58-Tooth

The GM LS Billet Crankshaft 4.000 Stroke with 58-Tooth reluctor from Manley is engineered for serious LS engine builders and high-performance enthusiasts seeking durability beyond stock specifications. Whether you're constructing a naturally aspirated stroker, forced induction platform, or street/strip hybrid, this billet crankshaft replaces weak cast-iron originals with a forged, metallurgically superior core. Built for engines that demand reliability under sustained boost, nitrous oxide, or extreme rpm loads, this component represents the foundation of a bulletproof rotating assembly.

Manley's billet construction uses premium alloy steel that withstands cyclic stress far exceeding cast counterparts, critical when adding forced induction or running elevated boost pressures. The 4.000-inch stroke increases displacement and low-end torque, a popular choice for 427+ cubic inch builds that demand broad powerband characteristics. The 58-tooth reluctor ring enables precision ignition timing with modern ECU tuning systems, allowing fuel and spark optimization across the entire rpm band. Precision-ground journals and pin diameters ensure proper bearing clearances, while the billet process eliminates casting porosity that causes fatigue cracks in high-stress applications.

This crankshaft suits LS1, LS2, LS3, and Gen IV LS engine platforms across truck, muscle car, and race applications. Builders upgrading to larger displacement or increasing boost levels find billet cranks indispensable insurance against catastrophic failure; a broken crank can destroy an entire engine and transmission assembly. Installation requires proper balancing with your specific pistons, rods, and damper to ensure harmonic stability. Pair this component with corresponding billet rods and pistons to realize the full potential of a modern, reliable stroker package capable of sustained 8,000+ rpm operation at competition power levels.