Callies APU-31V-AS LS Apex Series Forged Steel Crankshaft with 4.125-Inch Stroke and Internal Balance

The Callies APU-31V-AS LS Apex Series forged steel crankshaft is designed for high-performance GM LS-Series engines. Featuring a 4.125-inch stroke and a one-piece seal, this crankshaft provides durability and strength for demanding applications. Constructed from premium forged steel, it offers excellent fatigue resistance and longevity. The crankshaft includes a 58X reluctor wheel, making it compatible with modern engine management systems. Its internal balance design ensures smooth operation and reduces vibration during high RPM runs. Suitable for professional engine builders and enthusiasts, this crankshaft is engineered to deliver reliable power and longevity in street, racing, or custom builds. Easy to install with verified specifications, the LS Apex crankshaft enhances engine performance and durability while maintaining precise manufacturing standards.

Features:

• Forged Steel Construction for Enhanced Strength and Durability

• 4.125-Inch Stroke for Increased Power Output

• Internal Balance Design for Smooth Operation

• Includes 58X Reluctor Wheel for Modern ECU Compatibility

• One-Piece Seal for Reliable Oil Sealing