ATI Performance Products 918900 Super Damper Harmonic Balancer SFI - 6.325 18.1

The ATI Performance Products 918900 Super Damper is a high-performance harmonic balancer engineered specifically for Small Block Ford engines. This advanced crankshaft damper effectively eliminates torsional crankshaft vibrations that can damage high-performance engines, delivering superior protection compared to OEM-style dampers.

Key Features:

• 6.325-inch outer diameter steel construction with black zinc chromate finish
• 28 oz external balance configuration for Small Block Ford applications
• SFI 18.1 certified for racing applications
• Patented 3-ring elastomer design with eight computer-machined grooves
• Laser-engraved 360-degree timing marks for precision tuning
• Steel outer and inner shells with steel inertia weight
• Four-bolt crankshaft pulley mounting pattern
• Single keyway design for secure crankshaft installation
• Tunable and rebuildable construction for long-term performance
• Width: 1.800 inches

The ATI Super Damper utilizes a unique multi-ring elastomer system with dyno-tested O-rings of proper durometer for each specific application. This design provides exceptional vibration dampening efficiency across the entire RPM range, making it ideal for both race and high-performance street engines. Digital vibration testing at 6000 RPM demonstrates the Super Damper is 30% more effective than original equipment dampers at controlling harmful crankshaft harmonics.

Compatible with Small Block Ford engines including 221, 255, 260, 289, 302, 351C, 351M, 351W, and 400 cubic inch applications. Mounting hardware sold separately.