ATI Performance Products ATI918940P Super Damper Harmonic Balancer

The ATI Performance Products ATI918940P Super Damper is a high-performance crankshaft harmonic balancer engineered exclusively for demanding race and street performance applications. ATI's patented Super Damper design is a trusted choice among professional racers and performance enthusiasts seeking maximum engine protection and efficiency.

Unlike conventional OEM-style rubber-bonded balancers, the Super Damper uses a proven elastomer O-ring damping system with a steel inertia weight retained inside precision-machined inner and outer shells. The inertia weight features computer-machined grooves that hold specially selected durometer O-rings, which are dyno-tested for each specific application to deliver optimal damping across the entire RPM range.

Key Features:

• Patented elastomer O-ring damping design — tunable, rebuildable, and serviceable
• Eliminates torsional crankshaft vibrations to protect engine internals
• Exceeds SFI 18.1 specification — approved for both street and sanctioned race use
• Inner and outer shells available in aluminum or steel construction
• Computer-controlled, laser-engraved 360-degree timing marks for precise ignition timing
• Black zinc chromate finish for corrosion resistance and durability
• Replaceable bolt-in crank hub design
• Extremely efficient vibration damping at all RPM levels
• OEM equipment on a variety of performance crate engines

The ATI Super Damper crankshaft harmonic balancer is the benchmark in performance damper technology, trusted by professional race teams and high-performance street builds alike. Its rebuildable construction means long-term value and the ability to re-tune damping characteristics as engine builds evolve.