Pontiac Bonneville Brougham 1977, Super Damper™ Harmonic Damper Steel Shell Assembly by ATI Performance®. Material: Steel. Include: With Steel Crankshaft Hub. Harmonic Balancer Finish: Black Zinc Chromate.
Fitment notes: Crankshaft Pulley Bolt Hole Quantity: 3.
|Engine Balance: External|
|Safety Rating: SFI 18.1|
|Degree Markings: Yes|
|Degree Marking Range: 360|
|Outside Diameter: 7.530"|
|Harmonic Balancer Material: Steel|
|Harmonic Balancer Construction: Elastomer|
|Harmonic Balancer Finish: Black oxide|
|Mounting Hardware Included: Yes|
|Maximum outer diameter - 7.425"|
|Average total weight - 15.00 Lbs|
- Eliminates torsional crankshaft vibrations
- Exceeds SFI 18.1 specs
- Laser engraved 360° timing marks
- Black zinc chromate finished
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).
ATI Performance Products is a family owned and operated company with over 50 years of experience in manufacturing top-grade race products, including competition transmissions, flexplates, adapter kits and internal transmission components. Located in Maryland, ATI Performance® produces a variety of true track-tested and proven products manufactured under the strictest quality control in one of the most advanced manufacturing facilities in the industry. ATI proudly holds over a dozen of U.S. Government patents.