Clutch Masters FX500 6 Puck Single Disc Clutch Kit 06-09 Legacy / 04-21 STI | 200-400% Increased Holding Capacity | Race-Only Clutch Kit
Overview
The Clutch Masters FX500 6 Puck Single Disc Clutch Kit is a high-performance race clutch designed specifically for the 2006-2009 Subaru Legacy and 2004-2021 Subaru WRX STI platforms. Engineered to handle extreme power levels, this kit delivers a substantial 200-400% increase in holding capacity compared to stock clutches. It is intended exclusively for race applications where rapid engagement and maximum clamping force are critical, making it unsuitable for street use due to its heavy pedal pressure and aggressive engagement characteristics.
Built around the Power Plus II Pressure Plate and a solid hub 6 puck ceramic button disc, the FX500 system emphasizes durability and heat dissipation under demanding conditions. The clutch features precision heat-treated diaphragms, heavy-duty straps, and a friction-reducing lubricant to prevent diaphragm binding, ensuring consistent performance during intense track or drag racing sessions. Clutch Masters’ engineering approach focuses on delivering race-proven components that thrive in high-stress environments, backed by SFI certification for competitive motorsports.
For Subaru owners pushing their Legacy or WRX STI beyond stock power levels, this clutch kit offers a reliable solution to handle increased torque without slipping. The solid hub design provides instant engagement, which enhances throttle response and power transfer but requires a committed driving style. This kit is ideal for racers and enthusiasts who demand uncompromising clutch performance and durability in their Subaru race builds.
Features & Specifications
This Clutch Masters FX500 6 Puck Single Disc Clutch Kit is engineered for the 2006-2009 Legacy and 2004-2021 WRX STI platforms and features a solid hub ceramic button disc for rapid heat dissipation and exceptional holding capacity. Constructed from premium ceramic friction material and ductile iron components, it delivers race-grade clamping force and durability for Subaru enthusiasts seeking maximum torque capacity in competition environments.
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Brand: Clutch Masters
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Product: FX500 6 Puck Single Disc Clutch Kit
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Part Number: 15017-HDB6
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Fitment: 2006-2009 Legacy / 2004-2021 STI
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Material: Ceramic Friction Disc, Ductile Iron Pressure Plate
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Finish: Natural metal finish with friction material coating
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Construction: Precision heat-treated diaphragms, heavy-duty straps, solid hub disc
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Origin: Made in USA
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Power Gains: 200-400% Increased Holding Capacity
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Tuning Required: Recommended for race applications
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Engagement: Aggressive, rapid engagement with clutch chatter
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SFI Certification: Spec 1.2 for NHRA, NDRA, IDRC, IHRA, SCCA, NASA competition
Key Benefits
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Performance: Handles significantly increased torque for high-power Subaru Legacy and WRX STI builds
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Durability: Ceramic button disc and heat-treated components resist fade and wear under extreme conditions
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Engagement: Rapid, solid engagement improves throttle response and power transfer on the track
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Fitment: Custom-built for precise fit on specified Subaru models, ensuring reliable installation
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Quality: Manufactured with premium materials and SFI certification for motorsport compliance
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Race Focused: Designed specifically for competition use, not recommended for street driving
What's Included
- 1× Clutch Masters FX500 6 Puck Ceramic Button Disc
- 1× Power Plus II Pressure Plate
- 1× Throwout Bearing (OEM or better quality)
- 1× Pilot Bearing (when applicable)
- 1× Alignment Tool
- 1× Instruction Card
- Decals
Installation & Compatibility
Installation of the FX500 clutch kit requires moderate to advanced mechanical skill and is best performed by a professional familiar with Subaru drivetrains. The kit is a direct replacement for the factory clutch assembly on the specified Legacy and WRX STI models but demands careful adjustment due to its aggressive engagement and heavy pedal effort. No special tools beyond standard clutch alignment and transmission removal tools are necessary. Because this is a race-only clutch, tuning and drivetrain modifications are recommended to optimize performance and drivability. It is critical to verify exact year and trim compatibility before purchase to ensure proper fitment.
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Professional Installation: Recommended
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Modifications Required: None for fitment; tuning recommended for optimal performance
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Verify Compatibility: Confirm fitment for your specific year and trim level of Legacy or WRX STI
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