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 Chevrolet LT1 Directed Injected 4340 Forged 4.00in Stroke Pro Series Crankshaft
4340 Non-Twist Forging: Lightweight, high-strength design for max performance
Manley Chevrolet LT1 Forged Crankshaft - 4.000 in. Stroke
Gun-drilled mains and lightened journals cut weight
Manley Performance isn't just selling components
Manley Crankshaft, CRANK-4340 4.000 STROKE.
Manley Crankshaft, CRANK-4340 4.000 STROKE
Heat-treated and nitrided for durability
Micro-polished journals reduce friction
Manley Crankshaft, 4340 4.000 STROKE
100% magnaflux-inspected
CRANK-4340 4.000 STROKE
Engine Crankshaft
Crankshaft