Clutch Masters FX500 6 Puck Single Disc Clutch Kit 18-21 WRX | 200-400% Holding Capacity | Race-Only Clutch Kit
Overview
The Clutch Masters FX500 6 Puck Single Disc Clutch Kit is a race-focused upgrade designed for Subaru WRX models from 2018 to 2021. Engineered to deliver 200-400% increased holding capacity over stock clutches, this kit is built for enthusiasts who demand uncompromising performance on the track. Featuring a solid hub 6 puck ceramic button disc and a billet aluminum pressure plate, it offers rapid engagement and exceptional clamping force, making it ideal for high-power applications where precise and aggressive clutch operation is required.
Developed with decades of clutch engineering experience, the FX500 kit incorporates Clutch Masters’ Short Shift series philosophy—combining lighter rotating mass, faster shifts, and consistent pedal feel. The billet aluminum clutch cover is 10% lighter than the OEM stamped steel, and the design maintains compatibility with factory hydraulics, ensuring a direct fit without sacrificing reliability. This kit stands out for its race-proven durability and heat dissipation capabilities, crafted specifically for Subaru enthusiasts who push their WRX to the limit.
While the FX500 excels in race environments, it is important to note that the ceramic puck design produces a heavy pedal feel and clutch chatter, making it unsuitable for street use. Subaru owners will appreciate the clutch’s ability to handle extreme power levels and rapid heat cycles, providing confidence during aggressive driving or competition. This clutch kit is a specialized solution for those who prioritize performance and engagement over daily drivability.
Features & Specifications
This Clutch Masters FX500 6 Puck Single Disc Clutch Kit is engineered for Subaru WRX (2018-2021) and features a solid hub ceramic button disc with a billet aluminum pressure plate. Constructed from high-grade ductile iron and ceramic friction materials, it delivers exceptional holding capacity and rapid heat dissipation for Subaru enthusiasts seeking race-level clutch performance.
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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: 15915-HDB6
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Fitment: 2018-2021 Subaru WRX
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Material: Ductile Iron Pressure Plate, Ceramic Button Disc
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Finish: Billet Aluminum Cover (Short Shift Series)
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Construction: CNC Machined Pressure Plate, Solid Hub Disc
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Origin: Not Specified
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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
Key Benefits
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Performance: Significantly increased clamping force supports high horsepower and torque builds without slipping.
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Durability: Ceramic button disc and ductile iron pressure plate provide excellent heat dissipation and wear resistance under extreme conditions.
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Fitment: Direct bolt-on compatibility with factory hydraulics and OE-style flywheels for seamless installation on 2018-2021 WRX models.
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Engagement: Rapid and precise clutch engagement ideal for race environments, enabling faster shifts and improved lap times.
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Weight Savings: 10% lighter billet aluminum clutch cover reduces rotating mass for quicker engine response.
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Quality: SFI certified for competition use, ensuring reliability and safety in motorsport applications.
What's Included
- 1× Clutch Masters FX500 6 Puck Ceramic Button Disc
- 1× Power Plus II Billet Aluminum Pressure Plate (Short Shift Series)
- 1× Throwout Bearing designed for short throw clutch
- 1× Pilot Bearing (when applicable)
- 1× Clutch Alignment Tool
- Installation Instructions
- Decals
Installation & Compatibility
Installation of the FX500 clutch kit is moderately complex and recommended for experienced mechanics or professional shops familiar with Subaru drivetrains. The kit fits directly to the stock single disc flywheel or compatible aftermarket OE-style flywheels and works with factory hydraulic systems, though upgrading to Clutch Masters’ internal hydraulic release bearing and master cylinder is advised for optimal performance. Due to the aggressive engagement and heavy pedal pressure, this clutch is intended for race use only and is not suitable for daily driving. Proper tuning and setup are essential to maximize the clutch’s capabilities and longevity.
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Professional Installation: Recommended
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Modifications Required: None for fitment; hydraulic upgrades recommended
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Verify Compatibility: Confirm fitment for your specific WRX model year and transmission
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