ATI Performance Products ATI917310 Super Damper Harmonic Balancer Big Block Chevy SFI - 7.074 in 18.1

The ATI Performance Products ATI917310 Super Damper is a high-performance harmonic balancer designed exclusively for internally balanced Big Block Chevy engines. This patented crankshaft damper eliminates torsional vibrations that rob horsepower and torque, making it ideal for race, street, and performance truck applications.

Key Features:

• SFI 18.1 certified for NHRA and IHRA competition use
• 7.074 inch outside diameter with 3-ring elastomer design
• Aluminum outer shell and aluminum hub construction for reduced weight
• Steel inertia weight with eight computer-machined grooves for proper durometer O-rings
• Laser-engraved 360-degree timing marks for precise engine tuning
• Black zinc chromate finish for corrosion resistance
• Single keyway design with three crankshaft pulley bolt holes
• Tunable and rebuildable for long-term performance

Construction Details:

• Shell weight: 6.25 lbs
• Inertia weight: 4.50 lbs
• Average hub weight: 0.85 lbs
• Total weight: Approximately 11.60 lbs

This Super Damper provides superior vibration control at all RPM ranges, protecting your crankshaft and engine bearings while maximizing power output. The elastomer construction with multiple O-ring retention grooves ensures optimal damping characteristics dyno-tested for Big Block Chevy applications. Mounting hardware sold separately.