The patented ATI Super Damper standard harmonic balancers are the only crankshaft dampers designed exclusively for high performance engines. Inner and outer shells are available in aluminum or steel, and contain a steel inertia weight. The inertia weights have six (2-ring design) or eight (3-ring design) computer-machined grooves to retain the proper durometer O-rings (dyno tested for each application). Whether you race or just drive on the street, ATI harmonic balancers are the perfect choice.

Features include:

* Eliminates torsional crankshaft vibrations
* Exceeds SFI 18.1 specs
* Black zinc chromate finished
* OEM equipment on a variety of crate engines
* Tunable, rebuildable, and extremely efficient at all rpm
* Laser-engraved 360° timing marks
* Supercharger and power steering drive pulleys available for some applications

Engine Balance:Internal

SFI Rating:SFI 18.1

Degree Markings:Yes

Degree Marking Range:360

Outside Diameter (in):5.500 in.

Keyway Quantity:One

Harmonic Balancer Material:Aluminum

Harmonic Balancer Construction:Elastomer

Harmonic Balancer Finish:Black zinc chromate

Mounting Hardware Included:No

Quantity:Sold individually.

Notes:2.750 in. bolt circle pulley mount. Aluminum 3-ring shell weight is 3.60 lbs.