ATI PERFORMANCE – SBC 6.780 Harmonic Damper – SFI
ATI917276
Harmonic Balancer – Serpentine Super Damper – 6.780 in OD – SFI 18.1 – AC Pulley – Aluminum / Steel – Black – Internal Balance – GM LS-Series – Each
Aluminum balancer for LS1, 6-groove serpentine, F-Body. 10% underdrive with AC pulley. Also fits 2005-06 GTO according to ATI.