Clutch Masters 725 Series Street Twin Disc Clutch Kit 06-09 Legacy / 04-21 STI | Twin Disc Performance | High-Durability Clutch Kit
Overview
The Clutch Masters 725 Series Street Twin Disc Clutch Kit is engineered for Subaru Legacy (2006-2009) and WRX STI (2004-2021) models requiring a robust clutch solution capable of handling high horsepower and torque. This kit includes a steel flywheel and hydraulic release bearing, designed to upgrade your drivetrain with a twin disc setup that balances street drivability and track-ready performance. It’s ideal for enthusiasts who demand strong clutch engagement without sacrificing pedal feel during occasional street use.
Built from decades of drag racing experience, the FX725 clutch system features a billet aluminum cover assembly that is Type 3 hard anodized for exceptional strength and minimal flex. This precision-machined cover provides roughly 25% more tensile strength than typical cast units, ensuring consistent clutch operation and improved clamping force. The innovative Quick Release (QR) pressure plate system further enhances smooth engagement and reduces clutch chatter by up to 50%, making it a standout choice for Subaru owners seeking a reliable multi-disc clutch with race-proven technology.
For Subaru drivers, this clutch kit delivers a significant upgrade in power handling while maintaining manageable pedal effort. The twin disc design maximizes clamping force and reduces rotational mass, which translates to quicker throttle response and improved acceleration. Whether you’re pushing your Legacy or STI on the street or the strip, the FX725 provides the durability and engagement needed to fully utilize your engine’s potential.
Features & Specifications
This Clutch Masters 725 Series Street Twin Disc Clutch Kit is engineered specifically for 2006-2009 Legacy and 2004-2021 WRX STI platforms and features a 7.25" twin disc design with a billet aluminum cover. Constructed from high-strength materials including billet aluminum and 1045 steel, it delivers superior clamping force and durability for Subaru enthusiasts seeking enhanced drivetrain performance and consistent engagement.
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Brand: Clutch Masters
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Product: 725 Series Street Twin Disc Clutch Kit
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Part Number: 15017-TD7S-SHV
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Fitment: 2006-2009 Legacy / 2004-2021 STI
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Material: Billet Aluminum (cover), 1045 Steel (flywheel)
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Finish: Type 3 Hard Anodized (cover and aluminum flywheel), Black Oxide (steel flywheel)
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Construction: CNC Machined Billet Cover, Precision Machined Flywheel
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Origin: Not specified
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Clutch Diameter: 7.25" (184mm)
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Disc Configuration: Twin Disc (1 ceramic rigid disc + 1 fiber tuff rigid disc for Street and Race TD7S)
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Pressure Plate: Quick Release (QR) System with spring-loaded bolts
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Flywheel Type: Steel Flywheel included
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Release Bearing: Hydraulic Release Bearing included
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Stages Available: Street and Race (TD7S), Race (TD7R - 2 ceramic discs)
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Pedal Effort: Reasonable for occasional street use
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Application Focus: Drag racing and high-performance street driving
Key Benefits
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Performance: Handles high horsepower and torque loads with superior clamping force for maximum power transfer.
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Durability: Billet aluminum cover with minimal flex ensures consistent clutch engagement and long-lasting reliability.
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Driveability: Quick Release system reduces clutch chatter and smooths engagement for improved street usability.
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Fitment: Designed specifically for Subaru Legacy and WRX STI models, ensuring precise compatibility and installation.
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Quality: CNC machined components and premium materials provide race-grade strength and performance.
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Value: Includes steel flywheel and hydraulic release bearing for a complete clutch upgrade package.
What's Included
- 1× Clutch Masters 725 Series Twin Disc Clutch Assembly (Street and Race TD7S configuration)
- 1× Steel Flywheel
- 1× Hydraulic Release Bearing
- Installation instructions
Installation & Compatibility
Installation of the Clutch Masters 725 Series Twin Disc Clutch Kit requires moderate to advanced mechanical skills and is generally recommended to be performed by a professional technician. The kit is a direct fit for specified Legacy and WRX STI models but may require clutch system bleeding due to the included hydraulic release bearing. No major modifications are necessary, but verifying exact year and trim compatibility is essential. Tuning is not required for clutch operation, but this clutch is best paired with supporting drivetrain upgrades and proper break-in procedures to ensure optimal performance and longevity.
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Professional Installation: Recommended
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Modifications Required: None
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Verify Compatibility: Confirm fitment for your specific year and trim level
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