ATI Performance Products ATI917109A Super Damper Harmonic Balancer

The ATI Performance Products ATI917109A Super Damper is a high-performance harmonic balancer engineered to eliminate destructive torsional crankshaft vibrations in demanding race and high-performance street applications. ATI's patented Super Damper design is the only crankshaft damper developed exclusively for high-RPM performance engines, and this unit exceeds SFI 18.1 certification requirements for NHRA and IHRA sanctioned competition.

Key Features:

• Patented torsional damper design eliminates crankshaft harmonics across the full RPM range
• Exceeds SFI 18.1 specifications — approved for NHRA and IHRA competition
• Computer-machined grooves retain precision-matched durometer O-rings, dyno-tested for the specific application
• Black zinc chromate finish for corrosion resistance and durability
• Computer-controlled, laser-engraved 360-degree timing marks for accurate ignition timing
• Tunable and rebuildable design for long service life
• Made in the USA using advanced CNC machining

ATI Super Dampers are trusted by professional and amateur racers alike. By controlling torsional vibration, they protect crankshaft bearings, extend engine life, and can free up measurable horsepower and torque. Whether building a dedicated race engine or a high-performance street machine, the ATI917109A delivers proven reliability and race-validated performance.