Aluminum Crank Hub - SBC

The ATI Performance Aluminum Crank Hub for Small Block Chevy (SBC) is engineered for serious engine builders and street performance enthusiasts who demand precision component reliability. This crank hub serves as the critical interface between your crankshaft and accessory drive system, handling alternator, water pump, and power steering loads while maintaining tight tolerances under high RPM conditions. Whether you're building a stock-appearing street engine or a high-output performance platform, a quality aluminum crank hub eliminates flex and harmonic distortion that cheaper cast-iron alternatives introduce into your drivetrain.

ATI Performance's aluminum construction reduces rotational mass while improving heat dissipation compared to traditional cast designs—a measurable advantage in engines running extended throttle cycles or forced induction. The precision machining ensures balanced weight distribution and eliminates run-out issues that compromise belt tracking and accessory bearing life. At just 1.05 pounds, this hub minimizes parasitic drag on your crankshaft without sacrificing durability, making it ideal for both naturally aspirated and boosted SBC platforms requiring dependable harmonic control and accessory synchronization throughout the full RPM range.

This hub is essential for any SBC engine rebuild—stock restorations, LS swap foundations, or dedicated race applications—where OEM wear or upgrade specifications demand a precision-engineered replacement. Installation straightens forward on existing SBC blocks, and proper balancing with your specific crankshaft and damper configuration is critical for long-term reliability. Mechanics and engine builders consistently specify ATI Performance components for their dimensional accuracy and resistance to stress cracking under load, ensuring your accessory drive system stays synchronized and protected for thousands of miles.