ATI Super Damper Serpentine Series Harmonic Balancer Suit Nissan SR20 RWD Street
4 & 5 Rib w/PS Pulley
Part # 918582 
• 5.500" Diameter
• 3 Ring
• Aluminium Outer Shell
• SFI 18.1 Approved
 Power steering pulley is 11% UD.
Super Damper® Harmonic Dampers
The patented ATI Super Damper is the only damper designed exclusively for high performance engines.
- 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
Inner and outer shells are available in aluminium or steel, and contain a steel inertia weight. This inertia weight has six (2-ring design) or eight (3-ring design) computer machined grooves to retain the proper durometer O-rings (dyno tested for each application).
*photo for illustration purposes only