ATI Performance Products 917289 Super Damper Serpentine Harmonic Balancer 6.78" GM LS-Series

The ATI Performance Products 917289 Super Damper is a patented high-performance harmonic balancer designed exclusively for GM LS-series engines. This serpentine series damper features a 6.780-inch outside diameter with a 10% underdrive configuration and is constructed with durable aluminum and steel components for optimal weight savings and strength.

Key Features:

• SFI 18.1 certified for racing applications including NHRA and IHRA competition
• Eliminates harmful torsional crankshaft vibrations across all RPM ranges
• Internal balance design for proper engine harmonics
• Six serpentine belt grooves for standard OEM drive systems
• Laser-engraved 360-degree timing marks for precise engine tuning
• Black anodized finish with zinc chromate coating for corrosion resistance
• Aluminum construction with steel inertia weight and elastomer dampening system
• Three-bolt crankshaft mounting with single keyway
• 8mm HTD x 28-tooth dry sump pulley compatible
• Tunable and rebuildable design for long-term performance

This Super Damper fits all ATI GM-front crank hubs and can be adapted to many engine combinations, providing maximum flexibility for high-performance and racing applications. The advanced elastomer dampening system uses computer-machined grooves with proper durometer O-rings that have been dyno-tested for optimal performance. Unlike traditional rubber-style dampers that deteriorate over time, the ATI Super Damper maintains consistent dampening efficiency throughout its service life.

Note: Requires shorter serpentine belt (Goodyear part #4060785 for accessories and #4040405 for A/C). Mounting hardware sold separately.