ATI Crank Hub & Inner Shell Steel - BBC w/1/4 Keyway Helmet Rear Wing Kit 3 in Mandrel

3 in Mandrel

1971-1971 Chevrolet Townsman

308 Grade stainless steel line has been double annealed for easier bending and flaring

Coil Spring Spacer

1100 lb/in Spring Rate

ATI Crank Hub & Inner Shell Steel - BBC w/1/4 Keyway Helmet Rear Wing Kit 3 in MandrelProduct 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.