Manley Performance Chevrolet LT1 Directed Injected 4340 Forged 4.00-Inch 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.

• 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 CRANK-4340 4.000-inch stroke Pro Series Crankshaft provides a robust foundation for high-performance engine builds. Crafted from high-quality 4340 alloy steel, this crankshaft offers exceptional strength and durability essential for demanding automotive applications. Its non-twist forging process results in a lightweight yet strong construction, maximizing efficiency and power output. Designed for extreme performance, it features gun-drilled mains and lightened journals to reduce weight without compromising integrity, promoting better engine response and longevity. Heat treatment and nitriding processes further enhance its resistance to wear and fatigue, ensuring consistent performance over time.
Micro-polished journals minimize friction, promoting smoother operation and reducing heat generated during engine activity. Each crankshaft undergoes 100% magnaflux inspection, guaranteeing the absence of flaws and ensuring reliability under high-stress conditions. Whether for street, race, or custom builds, this crankshaft is engineered to withstand the rigors of extreme engine demands while maintaining precise balance for smooth operation. Built specifically for Chevrolet LT1 engines with directed injected systems, it is an ideal choice for enthusiasts seeking a durable and high-performance component to elevate their engine’s capabilities.
Designed and manufactured by Manley Performance, this crankshaft combines innovative manufacturing techniques with rigorous quality control, making it a dependable choice for serious automotive projects. Its 4.00-inch stroke provides increased displacement potential, supporting higher horsepower and torque figures. Engine builders and performance enthusiasts can trust this crankshaft to deliver consistent, reliable performance across a wide range of applications, ensuring their engine build is both resilient and optimized for maximum output.

Features:

• 4340 alloy steel construction for high strength and durability

• Non-twist forging process for lightweight, high-performance design

• Gun-drilled mains and lightened journals reduce weight

• Heat-treated and nitrided for enhanced wear resistance

• Micro-polished journals for reduced friction

• 100% magnaflux inspected for quality assurance

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1