ATI Crank Hub - Steel - .005 Undersize Chevy SB/90 V-6 Pont 4-Cyl

This is an ATI steel crank hub, specifically sized at .005 inch undersize. It's made to fit a range of popular GM engines, including Chevy small blocks, 90-degree V-6 engines, and Pontiac 4-cylinder applications. A crank hub is a crucial part of your engine's timing system, connecting the crankshaft to the harmonic balancer or pulley. Ensuring you have the correct size and a well-made hub is important for proper engine operation and to prevent issues down the line.

ATI is known for making solid engine components, and this steel hub is built to last. The .005 undersize specification means it's intended for applications where the crankshaft snout might have been machined down slightly, or for a tighter fit during rebuilds. This part is a direct replacement for the factory hub, designed to install without modification on the compatible engines. Having a properly fitted crank hub ensures your harmonic balancer stays securely in place, which is vital for maintaining accurate ignition timing and smooth engine performance.