ATI PERFORMANCE LS1 6.78 Harmonic Damper - SFI 917278

ATI PERFORMANCE 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.