Speedmaster PCE276.1034 Chevy BBC 454 4340 Forged Steel Crankshaft 4.500 Stroke

The Speedmaster PCE276.1034 is a forged 4340 steel crankshaft engineered for Chevy big-block (BBC) 454 engines. This precision component features a 4.500-inch stroke and is manufactured to meet the exacting demands of high-performance and racing applications where durability and reliability are critical.

Constructed from 4340 forged steel, this crankshaft delivers superior strength and fatigue resistance compared to cast alternatives. The unit arrives internally balanced and is configured as a 2-piece design with standard journal sizing (RJ-2.2), making it compatible with OEM and aftermarket BBC 454 applications. Ideal for engine rebuilds, performance upgrades, and competition builds, this crankshaft provides the foundation needed for consistent power delivery and longevity in demanding operating conditions.

Key Features & Benefits

• 4340 Forged Steel: Superior strength and fatigue resistance for high-performance engine applications.
• 4.500 Stroke: Engineered to OEM BBC 454 specifications for proper engine geometry.
• Internally Balanced: Reduces vibration and stress on engine components during operation.
• 2-Piece Design: Standard configuration for BBC 454 engine compatibility and assembly.
• Standard Journal Sizing: RJ-2.2 journals ensure fit with OEM and aftermarket bearings.

Specifications

Ideal Applications

• BBC 454 engine rebuilds and restoration
• High-performance and racing engine builds
• Aftermarket engine upgrades
• Competition and track applications