SBC U/L 4340 Forged Crank - 3.480 Stroke

The EAGLE SBC U/L 4340 Forged Crank with 3.480 stroke is a premium small block Chevy crankshaft engineered for builders pursuing high-performance internal engine builds. This forged 4340 steel crankshaft delivers the stroke dimension critical for achieving specific displacement targets and performance characteristics in small block applications, whether for street performance, racing, or long-block assembly.

Built from 4340 forged steel, this crankshaft offers superior strength and fatigue resistance compared to cast alternatives, essential for engines operating at sustained high RPM or elevated boost levels. The internal balance design eliminates the need for external counterweights, streamlining installation and reducing complexity in tight engine bays. The two-piece rear seal design accommodates modern sealing standards while maintaining compatibility with small block Chevy block configurations. At 51 pounds, the rotating assembly weight is consistent with quality forged cranks used in competitive engine programs.

This crankshaft is intended for engine builders and performance enthusiasts assembling complete short blocks or long blocks where precise stroke specification is non-negotiable. The 3.480 stroke dimension pairs with various bore sizes to deliver displacement targets ranging from small-displacement, high-revving builds to larger cubic-inch combinations. EAGLE crankshafts are recognized within the performance engine building community for manufacturing precision and material quality, making this unit suitable for both naturally aspirated and forced-induction applications where reliability and dimensional accuracy matter.