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Manley Chevrolet LT1 Directed Injected 4340 Forged 4.00in Stroke Pro Series Crankshaft

we're providing the core strength your engine build demands. The Pro Series 4340 Alloy Steel Crankshaft is an efficient and precisely balanced foundation for performance, built not just to survive, but to handle extremes across a wide range of applications. Manley Crankshaft, CRANK-4340 4.000 STROKE Manley Crankshaft, CRANK-4340 4.000 STROKE.
  • 4340 Non-Twist Forging: Lightweight, high-strength design for max performance
  • Gun-drilled mains and lightened journals cut weight
  • Heat-treated and nitrided for durability
  • Micro-polished journals reduce friction
  • 100% magnaflux-inspected

The Manley Performance Chevrolet LT1 4340 Forged 4-Inch Stroke Pro Series Crankshaft provides the core strength and durability essential for high-performance engine builds. Crafted from high-quality 4340 alloy steel, this crankshaft features a non-twist forging process that ensures a lightweight yet robust foundation for demanding applications. Its precisely balanced design promotes smooth operation and optimal power transfer, making it ideal for both street and racing engines. The crankshaft's micro-polished journals minimize friction, contributing to improved efficiency and longevity.
Built to withstand extreme conditions, the Manley Pro Series crankshaft is heat-treated and nitrided for enhanced durability and resistance to wear. Gun-drilled mains and lightened journals reduce overall weight without compromising strength, which helps improve engine responsiveness and reduce stress on other components. Each crankshaft undergoes 100% magnaflux inspection to ensure integrity and reliability, offering peace of mind for performance enthusiasts.
Designed specifically for Chevrolet LT1 engines, this forged crankshaft is an essential upgrade for those seeking to increase horsepower and torque while maintaining engine durability. Its precision engineering and high-grade materials make it a reliable choice for custom builds, high-performance street engines, or racing applications where strength and consistency are critical. Trust the Manley Performance Pro Series crankshaft to deliver the performance and durability your engine demands for demanding driving conditions and extreme performance tuning.

Features:

  • 4340 non-twist forging for lightweight, high-strength performance
  • Gun-drilled mains and lightened journals for reduced weight
  • Heat-treated and nitrided for increased durability
  • Micro-polished journals to reduce friction
  • 100% magnaflux-inspected for quality assurance