Manley Chrysler 5.7L Hemi Forged Crankshaft - 4.050in Stroke

Forged from 4340 alloy steel, this Manley Pro Series crankshaft is built for serious performance builds. It features a 4.050-inch stroke, which is a key detail for anyone looking to increase their engine's displacement. For a 5.7L Hemi, this stroke can effectively turn it into a 392 cubic inch engine, and for a 6.1L or 6.4L Hemi, it can become a 426 cubic inch powerhouse. This kind of displacement increase is a significant step for boosting overall engine output.

Beyond the increased stroke, Manley has incorporated several features to optimize performance and durability. The crankshaft is designed with a lightweight approach, utilizing gun-drilled mains and lightened rod journals. The counterweights are carefully profiled to ensure the entire assembly is precisely balanced, which is crucial for high-RPM stability and reducing vibration. To further enhance its strength and longevity, it goes through a multi-step heat treatment process and nitriding. The journals themselves are micro-polished with large radii, minimizing friction and contributing to better overall engine efficiency.

Manley also puts each crankshaft through rigorous quality assurance checks. This includes stress relief, shot peening, and 100% magnafluxing to ensure it meets their strict standards before it ever leaves the factory. If you're building a performance Hemi engine and need a solid foundation for increased displacement and power, this crankshaft is a well-built option.