ATI Crank Hub & Inner Shell Steel - BBC w/1/4 Keyway 931011 Precision rolled threads prevent galling

Precision rolled threads prevent galling while promoting more consistent torque loading

Perfect for building custom dash panels or when adding mechanical gauges to replace existing gauges or warning lights

1979-1980 GMC C1500

A hydraulic shock absorber is built into the backplate of the device to help dampen head movement throughout the entire length of impact

MOST POPULAR Use SF103 For Gas & Limited Alcohols

ATI Crank Hub & Inner Shell Steel - BBC w/1/4 Keyway 931011 Precision rolled threads prevent gallingProduct Description: Harmonic Balancer Hub Inner Shell Steel Black Oxide ATI Balancers Big Block Chevy Sold Individually ATI Performance Products is a company founded on innovation, precision and service. ATI harmonic Super Dampers add horsepower and torque to race, street and truck engines. ATI Performance Products is the creation of over 40 years of Transmission and performance component manufacturing and racing experience.