ATI Performance Products ATI918455EP Super Damper Harmonic Balancer

The ATI Performance Products ATI918455EP Super Damper is a patented, high-performance crankshaft harmonic balancer engineered exclusively for demanding race and street applications. Designed to eliminate destructive torsional crankshaft vibrations, this Super Damper helps protect engine internals while freeing up horsepower and torque across the RPM range.

ATI Super Dampers utilize a proven elastomer O-ring dampening system, where computer-machined grooves in the inertia weight retain precisely selected durometer O-rings that are dyno-tested for each specific application. This design delivers tunable, rebuildable vibration control that outperforms conventional rubber-bonded OEM-style harmonic balancers — especially under high-load, high-RPM conditions.

Key Features:

• Patented elastomer O-ring dampening design — tunable and rebuildable
• Exceeds SFI 18.1 specification requirements
• Computer-machined inertia weight grooves retain application-specific durometer O-rings
• Inner and outer shells constructed of aluminum or steel with a steel inertia weight
• Black zinc chromate finish for corrosion resistance
• Laser-engraved 360-degree timing marks for precise ignition timing
• Eliminates torsional crankshaft vibrations at all RPM levels
• Compatible with race and street use

The ATI918455EP is sold individually and is the trusted choice for performance enthusiasts who demand reliable crankshaft protection without sacrificing power. ATI Super Dampers are OEM equipment on a variety of crate engines and are approved for NHRA and IHRA competition use.