ATI Crank Hub & Inner Shell Steel - BBC w/1/4 Keyway 931011 Studs have a nut-starter radius

Studs have a nut-starter radius to prevent cross-threading / and available in polished stainless steel or black oxidized chromemoly

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

For off-road use only

All adjusters are constructed of Ultra-Light aircraft quality material

With seven layers of progressively finer mesh cotton gauze/synthetic media between 100-percent polyurethane top and base

ATI Crank Hub & Inner Shell Steel - BBC w/1/4 Keyway 931011 Studs have a nut-starter radiusProduct 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.