Ati Performance Harmonic Balancer - Serpentine Super Damper - 6.780 in OD - SFI 18.1 - Aluminum / Steel - Black - Internal Balance - GM LS-Series - Each-917289--Notes: 01-04 ZO6 Corvette 10% UD w/8mm HTD Dry Sump Pulley State Restrictions- Canada Restriction-NO -Emission Warnings--NO Truck Freight ---NO