ATI Performance Products 917300 Super Damper Harmonic Balancer Big Block Chevy - 7.074

The ATI Performance Products 917300 Super Damper is a high-performance harmonic balancer designed exclusively for Big Block Chevrolet engines including 396, 402, and 427 cubic inch applications. This patented crankshaft damper delivers superior vibration control and horsepower gains for both racing and street performance builds.

Key Features:

• Aluminum outer shell with steel crankshaft hub and steel inertia weight for optimal strength-to-weight ratio
• 3-ring design with eight computer-machined grooves retaining proper durometer O-rings dyno tested for each application
• 7.074-inch outside diameter with 1.500-inch width
• Internally balanced for standard Big Block Chevy applications
• Exceeds SFI 18.1 certification requirements for racing safety
• Laser-engraved 360-degree timing marks for precise engine tuning
• Black zinc chromate finish for corrosion resistance
• Total weight of 6.25 lbs with 4.5 lbs inertia weight
• Three crankshaft pulley bolt holes with single keyway
• Tunable, rebuildable, and extremely efficient at all RPM ranges

The ATI Super Damper eliminates harmful torsional crankshaft vibrations that cause parasitic horsepower loss and engine damage. This damper is OEM equipment on GM ZZ572 crate engines and trusted by professional engine builders worldwide. Elastomer construction provides superior vibration damping while maintaining durability under extreme racing conditions. Sold individually; mounting hardware not included.