ATI PERFORMANCE #917261 SBC 6.325 Harmonic Damper - SFI
SBC 6.325'' HARMONIC DAMPER-SFI
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. These damper assemblies are used 100% by NASCAR Cup, Busch Grand National and most endurance engine builders. 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 aluminum 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).
|Truck Freight Only||NO|
|Warnings||These products may contain a chemical known to the state of California to cause cancer and birth defects or other reproductive harm|