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.

Product features

• 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

• Engine Balance: Internal
• SFI Rating: SFI 18.1
• Degree Markings: Yes
• Degree Marking Range: 360
• Outside ⌀ (in.): 5.500 in.
• Crankshaft Pulley Bolt Hole Quantity: Three
• Keyway Quantity: One
• Harmonic Balancer Material: Aluminum
• Harmonic Balancer Construction: Elastomer
• Harmonic Balancer Color: Black zinc chromate
• Mounting Hardware Included: No
• Quantity: Sold individually

• Toyota Supra L6 Toyota inline 6-cylinder 3.0L/2954cc 1987-1992

• Aluminum 3-ring design outer shell weight is 3.60 lbs. Steel crankshaft hub with inner shell average weight is 2.6 lbs.