Description
The Manley Performance Chevrolet LT1 4.000-inch stroke lightweight Pro Series crankshaft is designed to deliver high performance for a wide range of domestic engine applications. Crafted from durable 4340 alloy steel, this crankshaft features a non-twist forging process that ensures enhanced strength and longevity. Its lightweight design, achieved through gun-drilled mains and lightened rod journals, reduces rotational mass for improved engine responsiveness and efficiency. Fully profiled counterweights provide precise balance, contributing to smoother operation and durability.
To withstand demanding engine conditions, the crankshaft undergoes a rigorous multi-step heat treatment process and nitriding, which significantly enhances its strength and wear resistance. Large radius journals are micro-polished to minimize friction, promoting better performance and longevity. Each unit is subjected to comprehensive quality assurance measures including stress relief, shot peening, and 100% magnaflux testing, ensuring reliability and consistent quality. This crankshaft is suitable for high-performance street and racing engines, offering a perfect balance of strength, weight reduction, and durability for demanding applications.
Designed for easy integration, the Manley Chevrolet LT1 4.000-inch stroke crankshaft is an excellent choice for enthusiasts seeking to upgrade their engine with a reliable component that emphasizes performance, durability, and precision engineering. Its lightweight construction and superior manufacturing processes make it an ideal upgrade for those looking to maximize horsepower and engine efficiency in their build.
Features:
- Lightweight 4340 non-twist forging reduces weight while maintaining durability
- Gun drilled mains and lightened rod journals for weight reduction and performance
- Fully profiled counterweights ensure precise engine balance
- Multi-step heat treatment and nitriding enhance strength and wear resistance
- Micro-polished large radius journals minimize friction and improve performance
- Rigorous quality assurance including stress relief, shot peening, and magnaflux testing






















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