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SPEC SF331-4 Stage 1 Clutch Kit for the 2012-2018 Ford Focus ST
The Spec SF331-4 is a Stage 1 clutch kit engineered for the 2012-2018 Ford Focus ST with the 2.0T EcoBoost engine. It replaces the factory clutch with a stronger, more durable street-oriented setup that holds up to 430 lb-ft of torque while retaining smooth, daily-drivable pedal feel. This kit is designed to be used exclusively with the Spec SF33A-4 billet flywheel (sold separately) and is not compatible with the stock flywheel or other Spec flywheels. It is the ideal upgrade for a lightly modified Focus ST that needs more clamping force than stock without sacrificing streetability.
Key Features
- Stage 1 non-ratcheting clutch kit for the 2012-2018 Ford Focus ST 2.0T EcoBoost
- Rated for up to 430 lb-ft of torque
- High-carbon organic friction disc for smooth engagement and long life
- Increased clamp-load pressure plate for improved holding power over stock
- Requires the Spec SF33A-4 billet flywheel; the stock dual-mass flywheel is not compatible
- Designed for daily-driven, street-focused Focus ST builds
- Spec manufacturer part number: SF331-4
Installation Notes
The SF331-4 must be installed together with the Spec SF33A-4 billet flywheel. If your Focus ST still has its factory dual-mass flywheel, you must order the SF33A-4 separately and install both at the same time. Installation requires removal of the transaxle and is best performed by an experienced technician. Always inspect the release bearing, pilot bearing, and slave cylinder during installation and replace as needed. Bed the clutch in with 300-500 miles of moderate, no-slip driving before applying full power.
Vehicle Fitment
| Years | Make | Model | Engine | Required Flywheel |
|---|---|---|---|---|
| 2012-2018 | Ford | Focus ST | 2.0T EcoBoost | Spec SF33A-4 billet flywheel (sold separately) |
Confirm your vehicle is a 2.0T EcoBoost Focus ST for these model years before ordering.
Specifications
| Detail | Value |
|---|---|
| Brand | Spec |
| Manufacturer part number | SF331-4 |
| Stage | Stage 1 |
| Disc type | High-carbon organic, non-ratcheting |
| Torque capacity | Up to 430 lb-ft |
| Required flywheel | Spec SF33A-4 (sold separately) |
| Intended use | Street / daily driver |
Frequently Asked Questions
What vehicles does the Spec SF331-4 fit?
The SF331-4 fits 2012-2018 Ford Focus ST models equipped with the 2.0T EcoBoost engine, when installed with the required Spec SF33A-4 billet flywheel.
Does the SF331-4 come with a flywheel?
No. The flywheel is not included. This clutch kit requires the Spec SF33A-4 billet flywheel, which is sold separately. The factory dual-mass flywheel is not compatible.
How much torque can the Spec SF331-4 hold?
Spec rates this Stage 1 clutch kit for up to 430 lb-ft of torque, making it well suited to stock and lightly modified Focus ST builds.
Is the SF331-4 good for a daily driver?
Yes. As a Stage 1 non-ratcheting clutch, it offers smooth, streetable engagement and pedal feel similar to stock, making it ideal for daily-driven Focus ST cars.
Can I use the SF331-4 with my stock flywheel?
No. The stock dual-mass flywheel is not compatible. You must use the Spec SF33A-4 billet flywheel with this clutch kit.
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