SKU: 74883133191

ATI Super Harmonic Street Damper - Subaru WRX / STi EJ20

Sale price$165.78 Regular price$184.20
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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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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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    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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    4.6 ★★★★★
    Based on 22 reviews
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    A
    Verified Purchase
    Amazon Customer
    New York, US
    ★★★★★ 5
    Beautiful shoe but too narrow
    Size: 10 Wide, Color: Navy Grainy Leather
    Too narrow
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on May 24, 2026
    T
    Verified Purchase
    Tim Arnette
    Fort Morgan, US
    ★★★★★ 5
    Looks good feels good
    Size: 13 Wide, Color: Black
    I've had them 2 weeks and love them. Took a little breaking in but they feel great now.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 8, 2026
    E
    Verified Purchase
    Elizabeth Henderson
    Phoenix, US
    ★★★★★ 4
    Very narrow
    Size: 10 Wide, Color: Cognac
    Run narrow. For very narrow feet. Wide width fits like a regular width.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 9, 2026
    M
    Verified Purchase
    Mynx
    Lowell, US
    ★★★★★ 5
    Comfortable Shoes Right Out of the Box
    Size: 9, Color: Black
    I bought these shoes for my husband. He has a very hard time finding quality, comfortable shoes. These shoes are just as comfortable as his New Balance. He uses them as a dress shoe and wears them at least once a week. There was no break in period necessary. They were comfortable right out of the box! The only thing we didn't like was the white sole color. Once I knew he was going to keep them, I used a black sharpie marker to color the soles black. Instant amazing, comfortable dress shoes. They were well worth the cost. If you or your SO needs a comfortable pair of shoes, we highly recommend them.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on September 2, 2025
    R
    Verified Purchase
    Rmanuel
    Cuba, US
    ★★★★★ 1
    Paid for new, received used.
    Size: 9.5 Wide, Color: Cognac, Size: 9.5 Wide, Color: Cognac
    Arrived dirty as if someone whore it for more than a few days. Maybe I was mistaken, but I saw nothing about “previously used” on the Amazon page. Returned it. I would suggest that the company use quality control when it comes to shipping. The shoes seem find otherwise. I ordered 9.5 and it was just a bit tight. If I reorder I will go for size 10.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on June 11, 2026

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