ATI 916359 Supercharger Pulleys, Serpentine, 6-groove, Steel, Black, 6.773 in OD

Part Number: 916359. The ATI Serpentine Super Damper contains grooves for serpentine belts machined into the outer damper shell. Exceeds SFI 18.1 specs. O.D., 10 Percent Underdrive. ATI 918053 Harmonic Balancer Super Damper Serpentine Series Internal Balance.