SKU: 74883133191

ATI Super Harmonic Street Damper - Subaru WRX / STi EJ20

Sale price$165.78 Regular price$184.20
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Description

ATI Super Harmonic Street Damper - Subaru WRX / STi EJ20These Super Damper standard harmonic balancers from ATI are specifically designed for high rpm engines. Their proven elastomer is designed and tuned to eliminate harmful crankshaft harmonics that cause parasitic horsepower loss. They are actually two dampers in one a 4 in. diameter inner damper and a 6 3 8 in., 7 in., or 8 in. diameter outer damper in two shells that bolt to the crank hub. These dampers are engineered to all but eliminate worn parts

These Super Damper standard harmonic balancers from ATI are specifically designed for high-rpm engines. Their proven elastomer is designed and tuned to eliminate harmful crankshaft harmonics that cause parasitic horsepower loss. They are actually two dampers in one--a 4 in. diameter inner damper and a 6 3/8 in., 7 in., or 8 in. diameter outer damper in two shells that bolt to the crank hub. These dampers are engineered to all but eliminate worn parts and timing problems. They're tunable in the field, rebuildable, and extremely efficient at all rpm.

The patented ATI Super Damper is the only damper designed exclusively for high performance engines.

  • Eliminates torsional crankshaft vibrations
  • Exceeds SFI 18.1 specs
  • Laser engraved 360° timing marks
  • Black zinc chromate finished
  • Damper is 3 ring and weighs 3.60lbs, hub weight is 2.20 lbs.
  • Outside diameter: 5.500in

Installation Note: ATI dampers are a 1-thousandths press fit, they do not just slide on like OEM crank pulley. They will need to be pressed onto the crank snout with a damper install kit.

Wanna learn more about engine dampers? click HERE

Lead photo used for illustration purposes.

    Shipping Notes
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    Exchange/Return Notes
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    • Final sale items are not eligible for returns or exchanges.
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    SKU: 74883133191

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    Donna L. Aiello
    Charlottesville, US
    ★★★★★ 5
    Very well made
    Size: Small, Color: Black
    Excellent product!
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    Reviewed in the United States on May 20, 2026
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    idk
    West Palm Beach, US
    ★★★★★ 5
    All star
    Size: Large, Color: Black, Size: Large, Color: Black
    Somehow my puppers knew this was for him immediately...I hadn't even inflated it with the included ball pump yet! He sat patiently waiting and then just lost it when it was ready for play. He uses the tabs to grab it but also can grab the side of the ball and hasn't punctured it yet. He loves when we do foot work trying to get it. He posed just like the Pros for a picture afterward. Paws down Teddy's new favorite toy.
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    John Beamon
    Houston, US
    ★★★★★ 1
    This ball used to be better made
    Size: Large, Color: Black, Size: Large, Color: Black
    This is my 3rd ball in the last several years. I purchased this one on 3/17/26. My dog and I play soccer every evening for 15 minutes, and I never leave her alone with the ball. The main handle has torn away from the ball, as you can see in the picture. I am disappointed and will hopefully find a better replacement.
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    Reviewed in the United States on April 11, 2026
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    Diamondgbf
    Dallas, US
    ★★★★★ 5
    So fun!! my dog loves this!!
    Size: Large, Color: Black
    Oh my gosh, finally a toy that he loves so much that doesn’t squeak!!! I have a big German Shepherd/Doberman and he loves this toy. He grabs one of those loops and he shakes it back-and-forth and I Chase him around the house. I throw it for him. It’s just so fun. When I have it and I wanna try to roll it past him really fast. He just puts his paw out like he’s a professional soccer player! I will definitely buy this again when all the little loops get chewed off but so far he’s only been able to chew off the main loop.
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    MR Mike
    Waukegan, US
    ★★★★★ 5
    Mackie gives these balls 5 stars
    Size: Medium, Color: Black, Size: Medium, Color: Black
    Best Jack Russell soccer ball ever. At 4 years Mackie has only punctuated 1 out of 5. Even Super Hero’s love a great soccer ball. Excellent gifts for your furry friends coast to coast. Highly Recommend
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    Reviewed in the United States on March 12, 2026

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