The ATI Super Damper crankshaft pulley for EJ WRX and STi is suitable for high power street and race use. Direct replacement for the stock OEM damper. The damper’s outer diameter is 5.5″ making it a 5% overdriven pulley.
Unlike undampened underdrive pulleys, which offer no protection to high performance engines, the ATI Super Damper provides balanced dampening of torsional crankshaft vibrations at all RPM levels. The ATI Super Damper comes with laser-etched timing marks and is a direct replacement for the OEM unit.
The ATI Super Damper is a critical component for all high performance cars to help protect against engine harmonics and features four-groove and five-groove serpentine belt drives on the outer shell to utilize the factory serpentine belt set-up. All ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition use.
Vehicle Fitment:
2002-2014 Subaru WRX
2004-2021 Subaru STi
Features:
• High horsepower street & race use
• Dampens torsional crankshaft vibrations at all RPM levels
• Protects against engine harmonics
• Direct replacement for the OEM unit
• Four-rib and five-rib serpentine belt drives
• 5% Overdriven
• Utilizes factory serpentine belt set-up
• Laser-etched timing marks
• SFI 18.1 Safety Certification and are approved for competition use
Specs:
• Shell Material: Aluminum, Part #916883 5% Overdriven
• Hub Material: Steel, Part #916884
• Inertia Weight: 2.2 LBS, 3-Ring
| Damper: | Part Number: | Diameter: | Weight: |
| EJ20 EJ22 EJ25 | 917991 | 5.5″ | 6.0 pounds |
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Orders that contain more than one item are assigned processing times according to each item.
We will inspect each and every one of the items ordered before shipping. The majority of orders are shipped within 48-hours. Delivery is expected to take between 3 and seven days.
Returns
We do not manage the stock in our warehouse or factory. The levels of stock can change at any time. Please be aware that it's possible for your order to be out of stock after you have placed the order.
The policy is 30 days. If it's been longer than 30 days since you bought the item We're sorry to say that we can't offer you a full refund or exchange.
The item cannot be used, and it must be in its original condition. It must also still be in the original package.
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