ATI Performance Products 918923 Super Damper Harmonic Balancer 6.325" Small Block Ford Internal Balance SFI 18.1

The ATI Performance Products 918923 Super Damper is a high-performance harmonic balancer engineered specifically for Small Block Ford engines with internal balance configurations. This precision-manufactured damper effectively eliminates torsional crankshaft vibrations in high-RPM applications, making it ideal for both racing and high-performance street engines.

Key Features:

• 6.325-inch outside diameter with aluminum outer shell and steel inertia weight
• Three-ring design with computer-machined grooves that retain proper durometer O-rings dyno-tested for optimal vibration dampening
• SFI 18.1 certified for competition use and exceeds SFI safety specifications
• 360-degree laser-engraved timing marks for precise ignition timing adjustment
• Black zinc chromate finish for corrosion resistance
• Tunable and rebuildable design for long-term performance
• 4-bolt Ford drive configuration with 3.35-inch hub length
• Shell weight of 3.90 lbs for optimal balance
• Compatible with Ford 289, 302, 351C, 351M, 351W, and 400 engines

This damper features ATI's patented elastomer construction that remains efficient at all RPM ranges, from idle to redline. The timing tab is positioned at the "C" location (10 o'clock when facing the front of the engine). Designed exclusively for custom internal balanced engine builds. Sold individually without mounting hardware.