Clutch Masters 725 Series Race Twin Disc Clutch Kit 06-09 Legacy / 04-21 STI | Twin Disc Performance | Race-Grade Clutch Kit
Overview
The Clutch Masters 725 Series Race Twin Disc Clutch Kit is engineered specifically for the 2006-2009 Subaru Legacy and 2004-2021 Subaru WRX STI platforms. Designed for drivers who demand extreme clutch performance, this kit features a 7.25" twin disc setup optimized for high horsepower and torque applications, particularly in drag racing and aggressive track environments. It includes a steel flywheel and hydraulic release bearing, with an optional push-type conversion available to suit different clutch actuation preferences.
Built with decades of drag racing expertise, the FX725 twin disc clutch system balances minimal rotational mass with robust clamping force. The billet aluminum cover assembly is Type 3 hard anodized for durability and strength, offering approximately 25% more tensile strength than typical cast covers. This design virtually eliminates flex, allowing for precise clutch engagement and consistent pedal feel. The unique Quick Release (QR) pressure plate system further enhances smoothness and reduces clutch chatter by up to 50%, making it one of the most refined multi-disc race clutches available.
For Subaru enthusiasts pushing their Legacy or WRX STI to the limits, this clutch kit delivers reliable power transfer and improved pedal response without sacrificing drivability for occasional street use. The steel flywheel is precision-machined from 1045 billet steel and treated with black oxide for corrosion resistance, ensuring long-lasting durability under demanding conditions. This combination provides a clutch solution that maximizes engine output while maintaining manageable pedal effort, essential for high-performance Subaru builds.
Features & Specifications
This Clutch Masters 725 Series Race Twin Disc Clutch Kit is engineered for the 2006-2009 Legacy and 2004-2021 WRX STI and features a 7.25" twin disc design with billet aluminum cover and steel flywheel. Constructed from high-strength billet aluminum and 1045 steel, it delivers superior clamping force and minimal rotational mass for Subaru enthusiasts seeking race-grade clutch performance and durability.
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Brand: Clutch Masters
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Product: 725 Series Race Twin Disc Clutch Kit
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Part Number: 15017-TD7R-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), Black Oxide (flywheel)
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Construction: CNC Machined Billet Cover, 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 + 1 fiber tuff rigid or 2 ceramic rigid discs)
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Stages Available: Street and Race (TD7S), Race (TD7R)
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Quick Release System: Spring-loaded bolts for smooth engagement and reduced chatter
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Included Components: Steel Flywheel, Hydraulic Release Bearing
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Push Type Conversion: Available
Key Benefits
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Performance: Handles extreme horsepower and torque for drag racing and high-performance builds
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Durability: Billet aluminum cover with Type 3 hard anodizing resists flex and wear under heavy loads
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Pedal Feel: Minimal cover flex ensures consistent and confident clutch engagement
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Noise Reduction: Quick Release pressure plate reduces clutch chatter by up to 50%
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Fitment: Designed specifically for Subaru Legacy and WRX STI with smaller bell housings
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Driveability: Suitable for occasional street use despite race-focused design
What's Included
- 1× Clutch Masters 725 Series Race Twin Disc Clutch Kit
- 1× Steel Flywheel
- 1× Hydraulic Release Bearing
- Push Type Conversion Kit (optional, if selected)
- Installation instructions
Installation & Compatibility
Installation of the Clutch Masters 725 Series Race Twin Disc Clutch Kit is moderately complex and generally recommended for experienced enthusiasts or professional mechanics familiar with Subaru drivetrains. The kit includes a hydraulic release bearing, but a push-type conversion is available if preferred. No major modifications are required, but proper alignment and clutch break-in procedures are essential to ensure optimal performance and longevity. This clutch is designed for specific Legacy and WRX STI models; verifying exact year and trim compatibility before purchase is critical.
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Professional Installation: Recommended
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Modifications Required: None, push-type conversion optional
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Verify Compatibility: Confirm fitment for your specific year and trim level
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