ATI Super Harmonic Street Damper - Subaru WRX / STi EJ20
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
    • Free Standard Shipping on $100+ Orders to the USA.
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    • Delivery to the USA:
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    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 74883133191

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    Kara
    Los Angeles, US
    ★★★★★ 5
    Great toy for both inside & outside play!
    Color: Pink, Size: 3 Inch, Color: Pink, Size: 3 Inch
    My Yorkies love this toy! This is my 3rd purchase of the same type of ball - the small 3" JW Pet HOL-lee ball. I bought one for my first Yorkie, she loved it, so when I got another Yorkie puppy, I bought a 2nd. They play with them so much that they sometimes get left outside. The green one was faded and started to blend it with the grass, so I bought a new one. It's great for a game of fetch, and isneasy to wash. Wish I could select a specific color, as I'd really like a purple one.
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    Reviewed in the United States on July 20, 2025
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    Solar Meadow
    Boise, US
    ★★★★★ 4
    Great indoors and out.
    Color: Blue, Size: 4.5 Inch
    This is a great toy if your dog likes balls. While it's not my dog's favorite (he favors small squeaky animals) it is safe indoors, soft on floor, walls and furniture and something durable for fetching.
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    Reviewed in the United States on February 16, 2026
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    MGW
    Whiting, US
    ★★★★★ 5
    Terrific for fetch, would not hold up to unmonitored chewing
    Color: Colors May Vary, Size: 5.5 Inch
    Fabulous for playing fetch. Young crazy-dog enjoys it! Would not hold up to using as a chew toy - we remove it when not playing with the dog.
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    Reviewed in the United States on January 13, 2026
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    Lg
    Chelsea, US
    ★★★★★ 3
    Gave my dog an allergic reaction
    Color: Blue, Size: 4.5 Inch
    I have one that has lasted 2 years of hard play, very durable. However, this newest one in the teal color gave my dog an allergic reaction. Her face and eyes swelled up within 1/2 of playing with it. So I threw it out. I have had no issues with the green one that I bought yesterday ago.
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    Reviewed in the United States on January 4, 2026
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    KWEST
    Grantham, US
    ★★★★★ 5
    The best gift for new dog owners
    Color: Blue, Size: 4.5 Inch
    This has been my mom's go-to toy to gift to friends and family when they get a new dog. I just followed suit and bought one as a gift for my friend's Newfoundland puppy. Versatile, can be used as a ball or tug of war toy, and can buy a bigger size for a puppy to grow into because they can still grab it by the holes, unlike other balls and toys that are just too big to get their mouth around
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    Reviewed in the United States on May 20, 2026

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