Speedmaster Chevy SBC 350 5140 Forged Steel Crankshaft PCE276.1068 – ST-3.480 Stroke

The Speedmaster Chevy SBC 350 5140 Forged Steel Crankshaft (PCE276.1068) is a heavy-duty internal engine component engineered for small-block Chevrolet 350 applications. Built from premium 5140 forged steel, this crankshaft delivers the strength and durability required for performance builds, restorations, and high-output engine modifications. The 3.480-inch stroke specification, combined with forged steel construction, supports reliable power delivery across a wide RPM range.

This crankshaft features a 2.1-inch rod journal diameter and is internally balanced as a single-piece unit, making it a direct fit for compatible SBC 350 blocks without additional balancing work. The 5140 material grade provides superior fatigue resistance compared to cast iron alternatives, ensuring longevity under demanding conditions. Ideal for street performance, drag racing, or complete engine rebuilds, this Speedmaster crankshaft is a trusted choice for enthusiasts and engine builders seeking OEM-quality components with proven reliability.

Key Features & Benefits

• 5140 Forged Steel: Premium forged steel construction delivers superior strength and fatigue resistance for high-performance and demanding engine applications.
• 3.480 Stroke Specification: Optimized 3.480-inch stroke dimension designed specifically for Chevy SBC 350 engine configurations.
• 2.1 Rod Journal: 2.1-inch rod journal diameter ensures proper fitment with standard SBC 350 connecting rod assemblies.
• Single-Piece Internally Balanced: Factory internally balanced design eliminates the need for additional balancing work during installation.
• SBC 350 Application: Direct fit for small-block Chevrolet 350 engines in restoration, performance, and rebuild projects.

Specifications

Ideal Applications

• Small-block Chevrolet 350 engine rebuilds and restoration projects
• High-performance street and drag racing engine builds
• OEM replacement for worn or damaged factory crankshafts
• Custom engine assembly for classic truck and muscle car restorations