ATI PERFORMANCE LS1 6.78 Harmonic Damper - SFI 917278

Harmonic Balancer - Serpentine Super Damper - 6.780 in OD - SFI 18.1 - AC Pulley - Aluminum / Steel - Black - Internal Balance - GM LS-Series - Each Y-Body 6-groove w/A/C pulley, 10% underdrive.