Callies BBS-425-CS BBC 4340 Forged Steel Crankshaft 4.750" Stroke

The Callies BBS-425-CS is a high-performance forged crankshaft designed for big block Chevrolet (BBC) engine applications. Precision-machined from premium 4340 chromoly steel, this crankshaft delivers exceptional strength and durability for high-horsepower street and race engines.

Key Features:

• Premium 4340 forged steel construction for maximum strength and fatigue resistance
• 4.750-inch stroke for increased displacement and torque output
• Cross-drilled design for improved oiling to rod bearings
• Precision ground rod and main journals to strict tolerances
• Nitrided surface treatment for enhanced wear resistance
• Intended for use with aftermarket connecting rods and engine blocks

This crankshaft is ideal for serious performance builds requiring a robust bottom end capable of handling high cylinder pressures and sustained high-RPM operation. Callies Performance Products is renowned for manufacturing some of the strongest crankshafts in the industry, trusted by professional engine builders and racers worldwide.