BBF 4340 Forged Crank - 4.500 Stroke

The BBF 4340 Forged Crank with 4.500 stroke is engineered for serious Big Block Ford engine builds where reliability and performance meet uncompromising durability. This component sits at the heart of any high-output BBF platform, whether you're building a street engine, strip competitor, or marine application. For mechanics and enthusiasts tackling stroker builds or high-RPM reliability upgrades, a quality forged crankshaft is the foundation that separates marginal builds from bulletproof powerplants.

Manufactured from premium 4340 forged steel, this EAGLE crankshaft delivers superior strength-to-weight characteristics critical for demanding engine duty. The 4.500-inch stroke increases displacement and low-end torque, making it ideal for builds targeting peak power below 6,500 RPM or street applications requiring responsive bottom-end grunt. The forging process yields a grain structure that resists fatigue cracking far better than cast counterparts, while the precision balancing ensures smooth operation across the entire RPM band.

At 85 lbs, this crank carries the heft expected from a precision-forged component designed to withstand peak cylinder pressures and sustained high-load scenarios. This crankshaft is best suited for Big Block Ford engines—particularly 429, 460, and stroker variants—where maximum stroke and structural integrity are non-negotiable. Installation requires proper balancing with your specific piston and rod combination, and careful attention to journal specifications.