ATI Harmonic Balancer Lower Pulley LSA



This ATI harmonic balancer is necessary when changing the size of you lower supercharger pulley. The larger the size of the chosen pulley, the higher boost levels you will experience. 


  • Eliminates torsional crankshaft vibrations
  • Exceeds SFI 18.1 specs
  • Black zinc chromate finished
  • Tunable, rebuildable, and extremely efficient at ALL RPM
  • Laser engraved 360° timing marks



The ATI Serpentine Super Damper contains grooves for serpentine belts machined into the outer damper shell. The dampers come standard with 6 outer grooves for standard OEM drive systems. 8 & 10 grooves are available for supercharger or turbo applications. Serpentine dampers are available in a variety of diameters. Crank hubs may be fitted with a 6 groove serpentine pulley to drive external oil pumps or vehicle accessories.




Additional information

Pulley Size

8.25, 8.66, 9.17, 9.55