ATI Performance Products ATI918433 Super Damper Harmonic Balancer Underdrive - 5% 6.78 8-Groove

The ATI Performance Products ATI918433 Super Damper is a high-performance harmonic balancer engineered specifically for demanding applications. This SFI 18.1 certified damper features a 5% underdrive design with an 8-groove serpentine belt configuration and 6.78-inch diameter outer shell.

Advanced Damping Technology:

The patented ATI Super Damper design effectively eliminates torsional crankshaft vibrations at all RPM ranges through its precision-engineered multi-ring system. Inner and outer shells are CNC-machined from aluminum and house a steel inertia weight. The inertia weight features computer-machined grooves that retain application-specific durometer O-rings, dyno-tested to provide optimal vibration dampening characteristics for high-performance engines.

Key Features:

• SFI 18.1 certified for racing and street applications
• 5% underdrive ratio for reduced parasitic drag and increased horsepower
• 360-degree laser-etched timing marks for precision tuning
• Black zinc chromate finish for corrosion resistance
• Aluminum construction with steel inertia weight
• Multi-ring design with application-specific O-ring durometer
• 8-groove serpentine pulley configuration
• 6.78-inch outer diameter

The ATI918433 Super Damper is highly recommended for heavily modified engines where controlling harmonic vibrations is critical to reliability and performance. The underdrive design reduces accessory load while the superior damping characteristics protect the crankshaft and bottom end components from destructive vibrations.