Clutch Masters 725 PRO Series Twin Disc Clutch Kit & Flywheel 06-09 Legacy / 04-21 STI | 700 ft.lbs Torque Capacity | High-Performance Drivetrain Upgrade
Overview
The Clutch Masters 725 PRO Series Twin Disc Clutch Kit & Flywheel is a purpose-built drivetrain upgrade designed for Subaru Legacy models from 2006 to 2009 and Subaru WRX STI models from 2004 to 2021. This conversion kit replaces the OEM clutch and flywheel setup with a high-capacity multi-disc system engineered to handle increased torque and abuse from high horsepower builds and racing applications. It is specifically designed to work exclusively with the Clutch Masters flywheel, requiring the OEM flywheel to be removed.
Clutch Masters has redefined their FX 725 line with the PRO Series, focusing on structural integrity and durability. The pressure plate now features 12 heat-treated 4140 steel posts instead of the previous 6 aluminum posts, significantly improving resistance to flex, wear, and heat under extreme conditions. Manufactured entirely in the USA, this clutch kit benefits from direct feedback from race teams and years of development, resulting in a product that meets rigorous SFI certification standards for motorsport use.
For Subaru enthusiasts and racers, this clutch and flywheel combo delivers a robust solution that supports aggressive driving and high torque outputs up to an estimated 700 ft.lbs. The choice between ceramic or sintered iron discs and aluminum or steel flywheels allows customization to match driving style and application, ensuring reliable engagement and longevity. This kit transforms the drivetrain experience by providing enhanced durability and consistent performance for demanding Subaru builds.
Features & Specifications
This Clutch Masters 725 PRO Series Twin Disc Clutch Kit & Flywheel is engineered for 2006-2009 Legacy and 2004-2021 Subaru WRX STI platforms and features a 7.25” multi-disc clutch with a 12-post steel pressure plate. Constructed from heat-treated 4140 steel and billet aluminum or steel flywheels, it delivers superior torque capacity and durability for Subaru enthusiasts seeking high-performance drivetrain reliability.
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Brand: Clutch Masters
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Product: 725 PRO Series Twin Disc Clutch Kit & Flywheel
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Part Number: 15017PTD7RSHV
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Fitment: 2006-2009 Legacy / 2004-2021 STI
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Material: 4140 Heat-Treated Steel (Pressure Plate), Billet 6061-T6 Aluminum or 1045 Steel (Flywheel)
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Finish: Type 3 Hard Coat Anodized (Aluminum Flywheel), Black Oxide Treated (Steel Flywheel)
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Construction: CNC Machined and Assembled in USA
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Origin: Made in USA
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Torque Capacity: 700 ft.lbs (estimated)
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Disc Options: Twin Race (Two Ceramic Rigid Discs), Triple Race (Three Ceramic Rigid Discs), Twin Iron (Two Sintered Iron Rigid Discs)
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SFI Certification: Yes
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Flywheel Compatibility: Requires Clutch Masters Flywheel (OEM Flywheel Not Compatible)
Key Benefits
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Durability: 12 steel pressure plate posts provide superior strength and resistance to flex and heat compared to OEM and previous models.
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Torque Handling: Supports up to an estimated 700 ft.lbs of torque, ideal for high horsepower and race applications.
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Customization: Multiple disc material options allow tuning of engagement feel and durability to suit street, track, or race use.
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Fitment: Designed specifically for 06-09 Legacy and 04-21 STI models ensuring precise compatibility and performance.
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Quality: Made entirely in the USA with CNC machining and rigorous quality control for consistent, reliable performance.
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Certification: SFI certified to meet motorsport safety and performance standards.
What's Included
- 1× Clutch Masters 725 PRO Series Twin Disc Clutch Kit (Disc type as selected)
- 1× Clutch Masters Flywheel (Aluminum or Steel, application-specific)
- Installation instructions
Installation & Compatibility
Installation of the Clutch Masters 725 PRO Series Twin Disc Clutch Kit & Flywheel requires removal of the OEM flywheel and clutch components. This is a moderate to advanced level installation best performed by a professional or experienced enthusiast with access to proper tools such as a transmission jack and torque wrench. The kit is a direct replacement for the specified Legacy and STI models but requires the use of the included Clutch Masters flywheel as the OEM flywheel is incompatible. Tuning is recommended for vehicles with modified engine management to optimize clutch engagement and drivability.
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Professional Installation: Recommended
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Modifications Required: Removal of OEM flywheel; use of Clutch Masters flywheel mandatory
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Verify Compatibility: Confirm fitment for your specific year and trim level before purchase
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