ATI Performance Products Engine Harmonic Balancer

ATI Super Damper: The Gold Standard in Engine Harmonic Balancers

When it comes to protecting a high-performance engine from the destructive forces of torsional crankshaft vibration, few names carry more weight than ATI Performance Products. Their flagship Super Damper line represents decades of race-proven engineering — and it remains one of the most trusted solutions in the engine harmonic balancer category for both strip and street applications.

ATI Performance Products manufactures Super Damper harmonic balancers for racing and high performance use, backed by over 50 years of performance component manufacturing and drag racing experience. That depth of knowledge translates directly into every balancer they produce.

Patented Technology Designed Exclusively for Performance

Patented ATI Super Damper standard harmonic balancers are the only crankshaft dampers designed exclusively for high performance engines. Unlike OEM-style elastomer balancers that degrade over time and at elevated temperatures, ATI's design relies on a precision O-ring system. Inner and outer shells are available in aluminum or steel and contain a steel inertia weight; the inertia weights have six (2-ring design) or eight (3-ring design) computer-machined grooves to retain the proper durometer O-rings, dyno tested for each application.

This approach makes ATI Super Dampers uniquely tunable and rebuildable — a critical advantage for racers who need to dial in damping characteristics or refresh their balancer without replacing the entire unit. Key features include: elimination of torsional crankshaft vibrations, exceeding SFI 18.1 specs, a black zinc chromate finish, suitability as OEM equipment on a variety of crate engines, tunable and rebuildable construction that remains extremely efficient at all RPM, laser-engraved 360-degree timing marks, and available supercharger and power steering drive pulleys for some applications.

Standard and Serpentine Series: Two Lines for Every Build

ATI offers two primary harmonic balancer product families. The Standard Super Damper covers a massive range of applications — from classic small-block Chevys and Ford 302/351 combinations to modern LS/LT engines, Mopar Hemis, Honda K-series, and Toyota platforms. The Serpentine Series Super Dampers are patented and feature grooves for serpentine belts machined directly into the outer damper shell, with six outer grooves for standard OEM drive systems — and eight or ten grooves available for supercharger or turbo applications.

Serpentine dampers are offered in a variety of diameters, and crank hubs may be fitted with a 6-groove serpentine pulley to drive external oil pumps or vehicle accessories. The Serpentine Series Super Dampers fit all ATI GM-front crank hubs and can be adapted to many engine combinations, providing maximum flexibility. They are available in steel or lightweight, hardcoated aluminum.

Race-Tested, Street-Proven

ATI proudly holds over a dozen U.S. Government patents. Located just outside of Baltimore, Maryland, ATI's manufacturing facility houses one of the most advanced machine shops in the industry — all machinery operations take place in-house so that total quality control can be maintained, with more than 30 CNC machines operating in the plant. This in-house approach ensures that every Super Damper meets the exact tolerances demanded by high-output engines.

Whether you're building a weekend bracket racer, a forced-induction street car, or a dedicated competition engine, ATI Performance Products offers a Super Damper to match. Browse the full selection of engine harmonic balancers to find the right fit for your application.