Speedmaster PCE276.1060 Chevy LS 4340 Forged Crankshaft 4.000 Stroke

The Speedmaster PCE276.1060 is a precision-engineered forged crankshaft designed for Chevy LS-series engine builds. Manufactured from 4340 steel, this crankshaft delivers the strength and durability required for high-RPM performance applications, street rod builds, and engine swaps where reliability under stress is critical.

This crankshaft features a 4.000-inch stroke with 2.1-inch rod journal and 6.098-inch main journal length, machined to exacting tolerances for proper fitment in LS-platform engines. The one-piece design with internal balance eliminates the need for external balancing hardware, streamlining installation and reducing overall complexity. Ideal for enthusiasts building custom LS engines, this forged crankshaft provides the foundation for consistent performance and longevity in racing, hot rod, and high-output engine applications.

Key Features & Benefits

• 4340 Forged Steel: Constructed from premium 4340 forged steel for superior strength and fatigue resistance in performance applications.
• 4.000 Stroke: Delivers the specified displacement and power band characteristics needed for LS engine builds.
• One-Piece Design: Internal balance configuration eliminates the need for separate balancing hardware and simplifies assembly.
• LS-Series Compatibility: Engineered specifically for Chevy LS engines with matched rod journal and main journal specifications.

Specifications

Ideal Applications

• LS engine performance builds and upgrades
• Custom street rod and hot rod engine assembly
• High-RPM racing engine construction
• Engine swap projects requiring robust crankshaft components