ACT Heavy Duty Performance Street Sprung + StreetLite Flywheel for the 2006-2026 Subaru WRX and 2005-2009 Legacy GT
The ACT Heavy Duty Performance Street Sprung + StreetLite Flywheel for the 2006-2026 Subaru WRX and 2005-2009 Legacy GT combines an upgraded ACT clutch with the ACT StreetLite flywheel in a single installation. HD pressure plate, Performance Street sprung disc, ACT StreetLite flywheel. The most popular WRX clutch upgrade in a complete package with the StreetLite flywheel. Use case: street-modified WRX with power gains, wanting the complete clutch/flywheel upgrade.
Best Seller — ACT Heavy Duty Street Sprung
The HDSS is ACT’s most popular street clutch. Engineered for modified daily-driven builds — more clamp load than OEM, smooth organic disc engagement, designed to hold real power without changing how the car drives.
DETAILS
- Includes: ACT StreetLite flywheel
- Pressure plate: see kit type
- Clutch disc: see kit type
- StreetLite: reduced rotating mass, improved response
- Use case: street-modified WRX with power gains, wanting the complete clutch/flywheel upgrade
The ACT StreetLite flywheel is machined to reduce rotational mass compared to the heavy OEM unit on EJ-series Subarus. The OEM WRX flywheel is notably heavy, the StreetLite replacement provides a perceptible improvement in throttle response and the feel of the engine through the rev range. On the EJ-series WRX, the flywheel upgrade is often described as transformative.
All SB11 flywheel-included kits bundle components validated together by ACT. Installing clutch and flywheel at the same time is the correct approach, both mating surfaces are fresh and the complete system is known.
What’s in the Box
- ACT pressure plate
- ACT clutch disc
- ACT flywheel
- Hardware and alignment tool
- Installation instructions
Why Choose ACT
Advanced Clutch Technology has been manufacturing performance clutch systems in the United States since 1993. Every ACT pressure plate uses a proprietary diaphragm design that increases clamp load and reduces deflection compared to OEM units, and every diaphragm goes through a four-stage heat-treating process before it leaves the factory. The result is a clutch system that holds more power than the stock unit, engages more precisely, and lasts longer under the kind of driving that wears factory clutches out quickly. ACT designs each application from scratch rather than modifying OEM tooling, which means the fitment is precise and the performance is intentional. Whether the build is a street-driven daily driver or a dedicated track car, ACT offers a kit at the correct specification for the use.
The RallySport Take
The ACT StreetLite flywheel is one of the most cost-effective modifications available for Subaru Models 2006-2026 Subaru WRX / 2005-2009 Legacy GT). The OEM flywheel is significantly heavier than it needs to be — it was engineered for smooth low-RPM operation at the expense of rotational responsiveness. Reducing that rotating mass is immediately perceptible in how the engine revs through the range and how precisely you can match revs on downshifts. Installing the flywheel at clutch replacement time adds almost no incremental labor since the transmission is already out. Fits Subaru applications 2005-2026.
Fitment
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2006-2026 | Subaru | WRX | Base/Limited/Premium |
| 2005-2009 | Subaru | Legacy | GT |
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