ATI Performance Products ATI917278 Super Damper Harmonic Balancer Underdrive - 6.780 10% LS1 LS2 LS3

The ATI Performance Products ATI917278 Super Damper is a high-performance harmonic balancer engineered for GM LS-series engines including LS1, LS2, LS3, and LS6 applications. This premium damper is designed to control crankshaft torsional vibrations across all RPM ranges while improving engine performance through a 10% underdrive pulley configuration that reduces parasitic drag on accessories.

Key Features:

• 6.780-inch outer diameter with internal balance design
• 10% underdrive configuration reduces load on alternator, A/C compressor, and power steering pump
• Six-groove serpentine pulley machined into outer damper shell
• 360-degree laser-etched timing marks for precise engine tuning
• Elastomer construction with aluminum and steel components
• Black zinc chromate finish for corrosion resistance
• SFI 18.1 certified for competition use
• Three crankshaft pulley bolt holes with single keyway

This patented Super Damper features grooves for serpentine belts machined directly into the outer damper shell, eliminating the need for separate crank-mounted pulleys. The elastomer damping element provides superior vibration control compared to conventional rubber ring dampers, helping to increase horsepower and torque while protecting your engine. Designed for use with air conditioning systems and requires a shorter serpentine belt due to the underdrive configuration. Mounting hardware sold separately.