Clutch Masters 850 Series Street Twin Disc Clutch Kit 06-09 Legacy / 04-21 STI | Twin Disc Design | High-Performance Clutch Kit
Overview
The Clutch Masters 850 Series Street Twin Disc Clutch Kit is engineered specifically for the 2006-2009 Subaru Legacy and 2004-2021 Subaru WRX STI, delivering a significant upgrade in clutch performance and durability. Designed for enthusiasts who demand a clutch capable of handling high horsepower and torque while maintaining manageable pedal effort, this twin disc setup offers a perfect balance between street drivability and track-ready capability. It includes a steel flywheel and features a pull-type design optimized for these Subaru platforms.
Built with racing technology at its core, the FX850 twin disc clutch system increases clamping force through a larger friction surface area and a billet aluminum pressure plate cover. This cover is hard anodized and machined for strength, reducing flex to just .003 inches compared to the much higher flex seen in cast or stamped covers. This rigidity translates to more consistent clutch engagement and better power transfer, making it a standout choice for Subaru owners looking to maximize drivetrain efficiency without sacrificing daily usability.
For Subaru drivers, this clutch kit means improved throttle response, reduced clutch chatter thanks to the Quick Release (QR) system, and enhanced durability under demanding conditions. The twin disc design effectively doubles the friction surface area, allowing the clutch to hold more power and torque without increasing pedal effort excessively. Whether you’re pushing your Legacy or STI on the street or the track, this clutch kit ensures you’re making the most of your engine’s output with confidence and precision.
Features & Specifications
This Clutch Masters 850 Series Street Twin Disc Clutch Kit is engineered for Subaru Legacy (06-09) and WRX STI (04-21) platforms and features a twin disc design with a steel flywheel. Constructed from billet aluminum and high-grade steel, it delivers superior clamping force and durability for Subaru enthusiasts seeking enhanced power handling and consistent engagement.
-
Brand: Clutch Masters
-
Product: 850 Series Street Twin Disc Clutch Kit
-
Part Number: 15017-TD8S-SW
-
Fitment: 2006-2009 Subaru Legacy / 2004-2021 Subaru WRX STI
-
Material: Billet Aluminum (Pressure Plate), Steel (Flywheel and Discs)
-
Finish: Type 3 Hard Anodized (Pressure Plate), Black Oxide Treated (Flywheel)
-
Construction: CNC Machined Billet Cover, Sprung Ceramic and Fiber Tuff Discs
-
Origin: Not Specified
-
Clutch Type: Twin Disc, Pull Type
-
Disc Configuration: 1 Sprung Ceramic Disc + 1 Fiber Tuff Rigid Disc
-
Flywheel Type: Steel Flywheel Included
-
QR System: Quick Release Pressure Plate with Spring-Loaded Bolts
-
Pedal Pressure Increase: Approximately 50% over single disc setups
Key Benefits
-
Performance: Handles high horsepower and torque loads with increased clamping force for reliable power transfer.
-
Durability: Billet aluminum pressure plate and steel flywheel provide exceptional strength and resistance to flex and wear.
-
Driveability: Quick Release system reduces clutch chatter and noise by up to 50%, improving street usability.
-
Fitment: Designed specifically for Subaru Legacy (06-09) and WRX STI (04-21) for precise compatibility and installation.
-
Consistency: Minimal cover flex (.003”) ensures consistent clutch engagement and better pedal feel.
-
Value: Includes a steel flywheel, eliminating the need for separate purchase and ensuring a complete upgrade.
What's Included
- 1× Clutch Masters 850 Series Street Twin Disc Clutch Kit
- 1× Steel Flywheel
- 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 need to remove the transmission and properly align the clutch components. No special tools beyond standard clutch installation tools are required, but care must be taken to ensure correct fitment and engagement. This clutch kit is designed specifically for the 2006-2009 Subaru Legacy and 2004-2021 Subaru WRX STI models; verify your vehicle’s year and trim before purchase. Tuning is not required for clutch operation, but this kit is ideal for vehicles with increased power output where factory clutches are insufficient.
-
Professional Installation: Recommended
-
Modifications Required: None
-
Verify Compatibility: Confirm fitment for your specific year and trim level
Shop with confidence at Subimods—your Subaru parts specialists.
