ATI Super Damper Harmonic Balancer Suit SB Chev with BB Chev snout
Part # 917783K
• 7.074" Diameter
• 3 Ring
• Dual Keyway
• Internal Balance
• Steel Outer Shell
• SFI 18.1 Approved
STD FRONT - USE WITH DRY SUMP COUNTER BORE TO ACCEPT DRIVE MANDREL - 2ND 1/4" KEYWAY AT 180° FROM STANDARD 
 Hubs for these assemblies have a 2.280 counterbore. A standard length crank bolt is used and the mandrel bolts to the 3 pulley mounting holes. This eliminates the 4” - 6” long bolt that is ineffective in retaining torque. Adapter part # 916321 is available for existing mandrels with 1.245” pilot.
Super Damper® Harmonic Dampers
The patented ATI Super Damper is the only crankshaft damper designed exclusively for high performance Chevy engines.
- Eliminates torsional crankshaft vibrations
- Exceeds SFI 18.1 specs
- Black zinc chromate finished
- OEM equipment on ZZ572 GM Crate Engines
- 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