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SKU: ATI918482L | UPC: 800157080272
ATI Damper 7.074in Alum 6 Grv Scion/Subaru/Toyota 4U-GSE FA20 2.0L 10 Percent UD
The ATI 918482L Super Damper is a high-performance crankshaft damper specifically engineered for Scion FR-S, Subaru BRZ, Toyota 86, and other vehicles with the FA20 / 4U-GSE 2.0L boxer engine. This 7.074" diameter aluminum damper features a 6-groove serpentine pulley and a 10% underdrive design to reduce parasitic drag from accessories, increasing horsepower and throttle response. Utilizing ATI's patented elastomer-bonded inertia ring technology, it eliminates harmful torsional crankshaft vibrations across the entire RPM range for superior engine protection and longevity. SFI 18.1 certified for competition use, this damper is ideal for naturally aspirated, turbo, or supercharged FA20 builds seeking maximum power, reliability, and crank safety.
Key Features & Benefits
- 10% Underdrive Pulley – Reduces accessory drag for measurable horsepower and torque gains
- 6-Groove Serpentine Design – Direct fit for stock or upgraded accessory belts
- Patented Elastomer-Bonded Inertia Ring – Absorbs torsional vibrations for smoother operation and crank protection
- 7.074" Diameter Aluminum Construction – Lightweight yet extremely durable; SFI 18.1 certified
- ATI Precision Engineering – Trusted in drag racing, road racing, and high-horsepower builds worldwide
Specifications
| Specification | Detail |
|---|---|
| Part Number | 918482L |
| Brand | ATI Performance Products |
| Application | Scion FR-S / Subaru BRZ / Toyota 86 (FA20 / 4U-GSE 2.0L) |
| Material | Aluminum outer shell with elastomer-bonded inertia ring |
| Diameter | 7.074 inches |
| Pulley Grooves | 6-groove serpentine |
| Underdrive | 10% |
| Certification | SFI 18.1 approved for competition use |
| Balance | Internal balance (matches OEM FA20 crank) |
Whats Included
- One ATI Super Damper crankshaft pulley (7.074" OD, 6-groove, 10% UD)
- Mounting hardware (bolts and washer pack as required)
- Installation instructions
Product Notes
- 10% underdrive increases power by reducing accessory load – ideal for performance and race applications
- Elastomer ring tuned specifically for FA20 boxer engine harmonics
- SFI 18.1 certification required for many racing classes and events
- Direct bolt-on replacement – uses factory crank bolt pattern and timing marks
- Made in the USA – ATI's legendary quality and motorsports-proven design
Installation Notes
- Estimated time: 2-4 hours (requires harmonic balancer puller/install tool)
- Remove old damper using proper puller tool (do not hammer)
- Align timing marks, install new ATI damper with provided bolts/washer
- Torque crank bolt to factory spec (typically 181 ft-lbs + angle torque)
- Professional installation recommended due to high-torque crank bolt and tool requirements
This Part Fits
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2013-2016 | Scion | FR-S | FA20 2.0L | Direct fit; 10% UD |
| 2013-2021 | Subaru | BRZ | FA20 2.0L | Direct fit; 10% UD |
| 2017-2021 | Toyota | 86 | FA20 2.0L | Direct fit; 10% UD |
| Various | Subaru/Toyota/Scion | FA20-Powered Vehicles | FA20 / 4U-GSE 2.0L | High-performance damper upgrade |
Why Choose ATI Super Damper for FA20?
- 10% underdrive delivers real power gains by reducing accessory drag
- Patented elastomer design eliminates harmful crank vibrations at high RPM
- SFI 18.1 certified safe for competition and high-horsepower builds
- ATI trusted in drag racing, road racing, and high-performance engines since 1968
Frequently Asked Questions
-
Q: Will this fit my 2017 Toyota 86?
A: Yes, direct fit for all FA20-equipped Scion FR-S, Subaru BRZ, and Toyota 86 models. -
Q: Does the 10% underdrive affect alternator or power steering?
A: Minimal impact on most street applications; ideal for performance use check belt tension and accessory output if running high electrical loads. -
Q: Is this SFI certified?
A: Yes, SFI 18.1 approved for racing and high-performance applications.
Shipping and Handling
- Method: UPS / FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure protective packaging
- Weight: Approx. 10-12 lbs (harmonic damper assembly)
ATI
ATI Performance Products has been at the forefront of race-winning drivetrain engineering since the 1980s, with over a dozen U.S. patents backing a catalog built for serious competition. From drag racing's top professional classes down to weekend street/strip builds, ATI components are trusted when reliability and power transfer are non-negotiable.Popular UpgradesThe ATI Super Damper is the gold standard in harmonic balancer technology, reducing crankshaft torsional vibration to protect engine components under high-RPM loads. The Superglide transmission series and Treemaster Converters are proven choices for automatic-equipped performance builds, while the Compu-Flow Valve Bodies add precision shift control. Flexplates, adapter kits, and internal transmission components round out the catalog for builders needing complete drivetrain solutions.Are ATI Super Dampers street legal?Yes. ATI Super Dampers are SFI-certified and designed for both street and strip use. They are a direct repla...
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