ATI Performance Products ATI916840 Super Damper Harmonic Balancer

The ATI Performance Products ATI916840 is a patented Super Damper harmonic balancer engineered exclusively for high-performance and racing engine applications. ATI's Super Damper line is the gold standard in crankshaft vibration damping, trusted on race engines and street builds alike.

Unlike factory OEM dampers or undamped pulleys, the ATI Super Damper uses a precision elastomer O-ring system to absorb and eliminate destructive torsional crankshaft vibrations. This protects the crankshaft and rotating assembly from harmonic stress that can cause power loss, bearing wear, and catastrophic engine failure at high RPM.

Key Features:

• Patented Super Damper design — the only crankshaft damper built exclusively for high-performance engines
• Exceeds SFI 18.1 certification requirements for NHRA and IHRA sanctioned competition
• Inner and outer shells in aluminum or steel, housing a precision steel inertia weight
• Computer-machined grooves retain proper durometer O-rings, dyno-tested for each specific application
• Tunable and rebuildable — O-rings can be replaced or retuned as needed
• Laser-engraved 360-degree timing marks for accurate ignition timing
• Black zinc chromate finish for corrosion resistance
• OEM equipment on a variety of GM crate engines

ATI Performance Products has been manufacturing race-proven drivetrain components since 1961 from their facility near Baltimore, Maryland. The Super Damper line is developed and validated on the dyno and dragstrip before reaching end users, ensuring reliable performance across the full RPM range — from street cruising to all-out competition.