Clutch Masters FX300 Single Disc Clutch Kit 06-09 Legacy / 04-21 STI | 110% Increased Holding Capacity | Street Performance Clutch Kit
Overview
The Clutch Masters FX300 Single Disc Clutch Kit is engineered for Subaru enthusiasts seeking a robust and reliable upgrade for their 2006-2009 Legacy or 2004-2021 WRX STI. Designed primarily for street use, this clutch kit significantly increases torque capacity by 110% over stock, making it ideal for highly tuned naturally aspirated engines, moderate boost turbo or supercharger setups, and even vehicles running up to 100 horsepower on nitrous oxide. It balances aggressive holding power with manageable pedal effort, providing a confident and positive engagement for spirited driving without sacrificing daily drivability.
Built around a heavy-duty Power Plus I pressure plate and a steel-backed segmented Kevlar friction disc, the FX300 system reflects Clutch Masters’ commitment to durability and performance. The segmented Kevlar material is non-abrasive, preventing damage to the flywheel and pressure plate surfaces, while the sprung hub design helps reduce drivetrain shock and vibration. This clutch kit is a proven performer within the Subaru community, known for its longevity and consistent engagement under demanding street conditions.
For Subaru owners, the FX300 clutch kit offers a meaningful upgrade that supports engine modifications such as camshafts, cylinder head work, and moderate forced induction without the harshness or short lifespan typical of race-oriented clutches. The kit requires a break-in period of at least 500 miles to ensure optimal performance and durability. This clutch strikes a practical balance, enhancing your Subaru’s drivetrain capability while maintaining smooth operation for everyday driving.
Features & Specifications
This Clutch Masters FX300 Single Disc Clutch Kit is engineered specifically for the 2006-2009 Legacy and 2004-2021 WRX STI platforms and features a heavy-duty Power Plus I pressure plate paired with a steel-backed segmented Kevlar disc. Constructed from durable Kevlar friction material and high-quality steel components, it delivers increased torque holding capacity and long service life for Subaru enthusiasts seeking enhanced street performance and reliability.
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Brand: Clutch Masters
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Product: FX300 Single Disc Clutch Kit
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Part Number: 15017-HDTZ
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Fitment: 2006-2009 Legacy / 2004-2021 WRX STI
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Material: Steel-backed segmented Kevlar friction disc, heavy-duty pressure plate
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Finish: Natural metal finish with durable friction surfaces
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Construction: Precision engineered with heavy-duty sprung hub and Marcel spring wafer
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Origin: Made in USA
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Torque Capacity: Approximately 110% increase over OEM
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Engagement: Street-friendly with slightly increased pedal pressure
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Break-in Period: Minimum 500 miles required
Key Benefits
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Performance: Handles increased torque from moderate boost and engine modifications without slipping
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Durability: Kevlar friction material offers long life and resists scoring on flywheel and pressure plate surfaces
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Engagement: Positive and smooth clutch engagement with only a slight increase in pedal effort for street comfort
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Fitment: Direct replacement for specified Legacy and WRX STI models ensuring OEM-level compatibility
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Reliability: Heavy-duty pressure plate and sprung hub reduce drivetrain shock and improve clutch life
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Value: Proven track record as a successful single disc option for street enthusiasts with tuned Subarus
What's Included
- 1× Clutch Masters FX300 Single Disc Clutch Kit
- Power Plus I Heavy-Duty Pressure Plate
- Steel-backed segmented Kevlar friction disc
- Heavy-duty sprung hub (when applicable)
- Marcel spring wafer
- OEM or better release bearing
- Pilot bearing (when applicable)
- Alignment tool
- Instruction card
- Decals
Installation & Compatibility
Installation of the FX300 clutch kit requires moderate mechanical skill and standard clutch replacement tools. While the kit is a direct fit for the specified Legacy and WRX STI models, professional installation is recommended to ensure proper clutch alignment and break-in procedures. The clutch requires a minimum 500-mile break-in period to achieve optimal performance and longevity. No major modifications are necessary, but verify compatibility with your specific year and trim level before purchase. Tuning is not required for the clutch itself, but ensure your engine management supports your power modifications.
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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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