Ati Performance Harmonic Balancer - Serpentine Super Damper - 6.780 in OD - SFI 18.1 - Aluminum / Steel - Black - Internal Balance - GM LS-Series - Each-917277--Notes: SBC LS1 F-body, aluminum shell. 40 rubber State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO