ATI Performance Products ATI918959 Super Damper Harmonic Balancer

The ATI Performance Products ATI918959 Super Damper is a high-performance harmonic balancer engineered to eliminate destructive torsional crankshaft vibrations in demanding race and street applications. ATI's patented Super Damper design is the benchmark in crankshaft vibration control, trusted by professional racers and performance enthusiasts worldwide.

Key Features:

• Patented elastomer O-ring design — inner and outer shells house a steel inertia weight with computer-machined grooves retaining precision durometer O-rings, dyno tested for each specific application
• Exceeds SFI 18.1 specifications — certified for NHRA and IHRA sanctioned competition
• Laser-engraved 360-degree timing marks for accurate ignition timing reference
• Black zinc chromate finish for corrosion resistance and long service life
• Tunable and rebuildable — O-rings can be replaced to restore or retune damping characteristics
• Effective across the full RPM range — designed to protect the crankshaft at both street and race RPM levels

ATI Super Dampers are developed and validated on the dragstrip before reaching the street, making the ATI918959 a proven upgrade over factory dampers and non-dampened pulleys that offer little to no protection for high-performance engines. Sold individually.