ATI Performance Products 917060K Super Damper Harmonic Balancer Big Block Chevy Internal Balance - 7.074

The ATI Performance Products 917060K Super Damper is a high-performance harmonic balancer designed specifically for Big Block Chevrolet engines (396, 402, and 427 cubic inch applications). This precision-engineered crankshaft damper eliminates harmful torsional crankshaft vibrations that can damage your engine at high RPM.

Key Features:

• 7.074-inch outer diameter steel shell construction with steel crankshaft hub
• Internal balance design for stock applications
• Exceeds SFI 18.1 safety specifications for racing and high-performance use
• Dual keyway design (1/4-inch and 3/16-inch) for versatile installation options
• Black zinc chromate finish for enhanced durability and corrosion resistance
• Laser-engraved 360-degree timing marks for precise engine timing adjustments
• 3-ring design with eight computer-machined grooves retaining dyno-tested O-rings
• Tunable and rebuildable construction for long-term performance
• Extremely efficient at all RPM ranges, from street to racing applications
• OEM equipment on GM ZZ572 crate engines

The patented ATI Super Damper features a steel inertia weight suspended between inner and outer shells using precision-matched elastomer O-rings. This unique design provides superior vibration dampening compared to conventional rubber-bonded dampers, protecting bearings, crankshafts, and other critical engine components. The one-piece center hub design ensures reliable performance in the most demanding racing and street applications.