Manley Chrysler 5.7L/6.1L Hemi 4.050in Stroke 4340 Forged Crankshaft w/ 58 Tooth Reluctor Wheel

This is the Manley Performance Pro Series crankshaft, built for Chrysler 5.7L and 6.1L Hemi engines. If you're looking to significantly increase your engine's displacement and unlock more power, this is a solid foundation. It features a 4.050-inch stroke, which can turn a 5.7L Hemi into a 392 cubic inch engine, or a 6.1L/6.4L Hemi into a 426 cubic inch powerhouse. This crankshaft also includes a 58-tooth reluctor wheel, essential for proper engine management on these Hemi platforms.

Manley builds these Pro Series cranks from a strong 4340 alloy steel forging. They've incorporated several features to optimize performance and durability. The mains are gun-drilled and the rod journals are lightened, which helps reduce overall weight and allows the engine to rev more freely. The counterweights are carefully profiled for precise balance. To ensure it stands up to demanding use, the crankshaft undergoes a multi-step heat treatment process and nitriding, significantly enhancing its strength and longevity. The journals are also micro-polished with large radii, which reduces friction and contributes to better performance and oil flow.

Before leaving Manley, each crankshaft is put through rigorous quality checks. This includes stress relief, shot peening for surface hardening, and 100% magnafluxing to detect any potential flaws. This attention to detail means you're getting a well-built component ready for your high-performance build. If you're rebuilding your Hemi top end and aiming for a significant displacement increase, this crankshaft is a critical piece.