Clutch Masters 725 Series Street Twin Disc Clutch Kit 06-17 WRX | Twin Disc Design | High-Performance Clutch Kit
Overview
The Clutch Masters 725 Series Street Twin Disc Clutch Kit is engineered specifically for the Subaru WRX and WRX STI models from 2006 to 2017, delivering exceptional clutch performance for high-horsepower applications. Designed to handle the demands of drag racing and aggressive street driving, this twin disc setup offers increased clamping force and improved torque capacity over traditional single disc clutches. It is ideal for enthusiasts seeking a durable, race-inspired clutch that maintains manageable pedal effort for occasional street use.
Built with decades of drag racing experience, the FX725 twin disc system features a billet aluminum cover assembly that is Type 3 hard anodized for superior strength and minimal flex. This precision-machined cover reduces flex to just .003", compared to up to .030" in cast or stamped units, ensuring consistent clutch engagement and enhanced driver confidence. The innovative Quick Release (QR) pressure plate system further improves clutch feel by evenly distributing pressure and reducing noise and chatter by up to 50%, making it a practical choice for street-driven performance Subarus.
For Subaru owners pushing the limits of their WRX or STI, this clutch kit provides the strength to handle significant horsepower and torque increases without sacrificing drivability. The combination of lightweight flywheels—available in billet aluminum or steel—and high-quality friction materials ensures rapid engine response and reliable power transfer. This clutch kit is a critical upgrade for those upgrading their drivetrain for track or drag use while maintaining street compatibility.
Features & Specifications
This Clutch Masters 725 Series Street Twin Disc Clutch Kit is engineered for 2006-2017 Subaru WRX and STI platforms and features a 7.25" twin disc design with a billet aluminum cover. Constructed from high-strength billet aluminum and premium friction materials, it delivers superior clamping force and durability for Subaru enthusiasts seeking enhanced torque capacity 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: 15021-TD7S-X
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Fitment: 2015-2021 WRX / 2004-2021 STI
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Material: Billet Aluminum Cover, Ceramic and Fiber Tuff Friction Discs
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Finish: Type 3 Hard Anodized (Cover and Aluminum Flywheel)
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Construction: CNC Machined Billet Cover, Multi-Disc Assembly
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Origin: Not Specified
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Disc Diameter: 7.25" (184mm)
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Disc Configuration: Twin Disc (1 Ceramic Rigid + 1 Fiber Tuff Rigid for Street Twin Disc Kit)
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Pressure Plate System: Quick Release (QR) System with Spring-Loaded Bolts
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Flywheel Options: Billet 6061-T6 Aluminum (SFI 1.2 Spec) or 1045 Steel
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Application Focus: Drag Racing and High-Performance Street Use
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Pedal Effort: Moderate for Street Usability
Key Benefits
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Performance: Handles high horsepower and torque loads for aggressive Subaru builds
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Durability: Billet aluminum cover with minimal flex ensures consistent clutch engagement and longevity
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Driveability: Quick Release pressure plate reduces clutch chatter and noise for smoother street operation
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Fitment: Designed specifically for WRX and STI models with smaller bell housings, ensuring precise compatibility
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Weight Savings: Lightweight billet aluminum flywheel options improve throttle response and reduce rotational mass
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Quality: Premium friction materials and hard anodized finishes provide reliable performance under demanding conditions
What's Included
- 1× Clutch Masters 725 Series Street Twin Disc Clutch Kit
- 1× Billet Aluminum Cover Assembly with Quick Release Pressure Plate
- 2× Friction Discs (1 Ceramic Rigid, 1 Fiber Tuff Rigid)
- 1× Flywheel (Aluminum or Steel, depending on selection)
- Mounting hardware
- Installation instructions
Installation & Compatibility
Installation of the Clutch Masters 725 Series Twin Disc Clutch Kit is moderately complex and generally recommended for experienced DIYers or professional mechanics due to the need for transmission removal and precise alignment. No special tools beyond standard clutch installation equipment are required. This kit is compatible with 2015-2021 Subaru WRX and 2004-2021 Subaru WRX STI models equipped with smaller bell housings. Tuning is recommended after installation to optimize clutch engagement and drivability, especially for vehicles with significant power upgrades.
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Professional Installation: Recommended
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Modifications Required: None beyond standard clutch replacement procedures
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Verify Compatibility: Confirm fitment for your specific year and trim level before purchase
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