Brand: ATI Performance Products
Manufacturer's Part Number: ATI918400
Part Type: Harmonic Balancers
Product Line: ATI Super Damper Standard Harmonic Balancers
Automotive Fittings Part Number: ATI-918400
UPC: 800157030666
Engine Balance: External
SFI Rating: SFI 18.1
Degree Markings: Yes
Degree Marking Range: 360
Outside Diameter (in.): 7.074
Crankshaft Pulley Bolt Hole Quantity: Three
Keyway Quantity: One
Harmonic Balancer Material: Steel
Harmonic Balancer Construction: Elastomer
Harmonic Balancer Color: Black zinc chromate
Mounting Hardware Included: No
Quantity: Sold individually.
Notes: Buick engines require mounting the damper face forward of the OEM location to clear the timing cover for external balance dampers. Hubs may be machined on the crank gear end when using the shorter internal balance units to move the damper closer to the engine. 430-455 engines are 0.725 in. forward of the OEM location. 265-350 engines and 252 V6 engines are 1.250 in. forward of the OEM location. Three ring design, weight is 8.75 lbs.
Description:
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 degree timing marks
* Supercharger and power steering drive pulleys available for some applications