Clutch Masters 850 Series Race Twin Disc Clutch Kit 06-09 Legacy / 04-21 STI | High Clamping Force | Twin Disc Clutch Kit
Overview
The Clutch Masters 850 Series Race Twin Disc Clutch Kit is engineered for Subaru enthusiasts seeking ultimate clutch performance for their 2006-2009 Legacy or 2004-2021 WRX STI. This 8.5” twin disc system is designed to handle high horsepower and torque outputs while maintaining manageable pedal pressure, making it suitable for both race and high-performance street applications. Available in "Street" and "Race" stages, it offers flexibility depending on your driving style and power goals.
Built with precision and durability in mind, the kit features a billet aluminum cover that is Type 3 hard anodized for strength and longevity. This cover exhibits minimal flex compared to cast or stamped units, ensuring consistent clutch engagement and improved driver confidence. The unique Quick Release (QR) pressure plate system reduces clutch chatter and noise by up to 50%, delivering smooth and reliable operation even under demanding conditions.
For Subaru owners pushing the limits of their drivetrain, this twin disc clutch kit provides increased clamping force and a larger friction surface area, translating to better power transfer and reduced slippage. The option to upgrade to the DLX series adds inherent damping to both discs, protecting the drivetrain from shock loads and enhancing durability for daily-driven high horsepower builds or race cars. This clutch kit is a direct fit for the specified Legacy and WRX STI models, making it a practical upgrade for serious Subaru performance enthusiasts.
Features & Specifications
This Clutch Masters 850 Series Race Twin Disc Clutch Kit is engineered for 2006-2009 Legacy and 2004-2021 WRX STI platforms and features an 8.5” twin disc design with a billet aluminum cover. Constructed from high-strength billet aluminum and premium friction materials, it delivers superior clamping force and consistent engagement for Subaru drivers seeking race-level clutch performance.
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Brand: Clutch Masters
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Product: 850 Series Race Twin Disc Clutch Kit
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Part Number: 15017-TD8R-XW
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Fitment: 2018-2021 WRX STI, 2006-2009 Legacy
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Material: Billet aluminum cover, ceramic and fiber friction discs
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Finish: Type 3 hard anodized (cover and aluminum flywheel)
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Construction: CNC machined billet cover, sprung and rigid discs
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Origin: Not specified
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Clutch Diameter: 8.5 inches (216mm)
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Disc Configuration: Twin disc with sprung ceramic and rigid discs
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Pressure Plate: 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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Stages Available: Street (TD8S) and Race (TD8R)
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Pedal Pressure Increase: Approx. 50% higher than single disc setups
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Upgrade Option: DLX series with dampened twin discs
Key Benefits
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Performance: Handles high horsepower and torque with increased clamping force for reliable power transfer.
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Durability: Billet aluminum cover reduces flex, improving clutch consistency and longevity under race conditions.
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Engagement: Quick Release pressure plate system smooths clutch operation and reduces noise and chatter.
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Fitment: Direct fit for 06-09 Legacy and 04-21 WRX STI, ensuring seamless installation without modifications.
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Adjustability: Available in Street and Race stages to suit different driving needs and power levels.
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Protection: Optional DLX upgrade adds damping to reduce drivetrain shock and improve daily drivability.
What's Included
- 1× Clutch Masters 850 Series Race Twin Disc Clutch Kit
- 1× Quick Release pressure plate assembly
- 1× Sprung ceramic disc
- 1× Rigid ceramic or fiber disc (depending on stage)
- 1× Aluminum or steel flywheel (application-specific)
- Installation instructions
Installation & Compatibility
Installation of the Clutch Masters 850 Series Twin Disc Clutch Kit is moderately complex and generally recommended for experienced DIYers or professional mechanics due to the precision required for clutch alignment and flywheel installation. No special tools beyond standard clutch installation equipment are typically necessary. This kit is a direct bolt-on for the specified 2006-2009 Legacy and 2004-2021 WRX STI models, but verifying exact year and trim compatibility is essential before purchase. Tuning is recommended after installation to optimize drivetrain performance and ensure smooth engagement, especially for race-stage setups.
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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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