High-performance ATI Super Damper harmonic balancer engineered for Subaru WRX models with EJ20, EJ22, and EJ25 engines

Description

The patented ATI Super Damper standard harmonic balancers are the only crankshaft dampers designed exclusively for high performance engines. 
Inner and outer shells are available in aluminum or steel and contain a steel inertia weight. The inertia weights have six (2-ring design) or eight (3-ring design) computer-machined grooves to retain the proper durometer O-rings (Dyno tested for each application).
Whether you race or just drive on the street, ATI harmonic balancers are the perfect choice.

Product Features: 

• Fits Subaru WRX EJ20, EJ22 & EJ25 engines
• Eliminates torsional crankshaft vibrations
• Tunable, rebuildable, and extremely efficient at ALL RPM
• Protects against engine harmonics
• Exceeds SFI 18.1 Certified for competition use
• Laser engraved 360° timing marks
• Black zinc chromate finished
• Made in America

Specifications:

• Aluminium Damper Shell
• 916884 Steel Hub
• Interia Weight: 2.4 lbs / 1.09 kg – 3 Ring
• Computer-Machined Grooves 
• 4 Rib & 5 Rib Serpentine Belt Drives
• 5% Overdriven
• Outer Diameter: 5.5″ / 13.97 cm
• Weight: 6.0 lbs / 2.72 kg

Vehicle Compatibility:
– Subaru Impreza WRX (EJ20/EJ22/EJ25)

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