Clutch Masters FX400 8 Puck Single Disc Clutch Kit 18-21 WRX | 170% Holding Capacity Increase | High-Performance Clutch Kit
Overview
The Clutch Masters FX400 8 Puck Single Disc Clutch Kit is engineered for Subaru WRX owners seeking a significant upgrade in clutch holding capacity without sacrificing street drivability. Designed for both aggressive street use and road or drag racing, this clutch kit delivers a 170% increase in holding power over stock, making it ideal for enthusiasts pushing their turbocharged Subaru to its limits. The 8-puck ceramic disc configuration offers a balance of rapid engagement and smooth operation, minimizing chatter while maintaining durability.
Built around Clutch Masters’ Short Shift (SS) series billet aluminum clutch cover, this kit combines lightweight construction with race-proven engineering. The design philosophy focuses on faster, more precise shifts with a pedal feel that remains familiar and manageable for daily driving. By utilizing an OE-style clutch cover and a heavy-duty sprung hub disc, Clutch Masters has created a clutch system that blends track-level performance with street-friendly characteristics, ensuring reliable engagement and longevity.
For Subaru WRX owners, this clutch kit translates to improved throttle response and enhanced power transfer, especially when paired with supporting upgrades like hydraulic release bearing and master cylinder enhancements. The FX400’s ceramic disc material excels in heat dissipation and wear resistance, making it a robust choice for high-torque applications. Whether you’re upgrading for spirited street driving or competitive motorsports, this clutch kit provides the durability and performance your Subaru demands.
Features & Specifications
This Clutch Masters FX400 8 Puck Single Disc Clutch Kit is engineered for Subaru WRX and compatible models, featuring an 8-puck ceramic disc designed for high holding capacity and street-friendly engagement. Constructed with billet aluminum and premium ceramic materials, it delivers a 170% increase in clamping force for enthusiasts seeking durable, race-capable clutch performance.
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Brand: Clutch Masters
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Product: FX400 8 Puck Single Disc Clutch Kit
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Part Number: 15915-HDCL
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Fitment: 2004-2005 Baja, 2004-2005 Forester, 2002-2005 WRX, 1991-1994 Legacy
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Material: Billet Aluminum Cover, Ceramic Friction Disc
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Finish: Natural Aluminum (cover), Ceramic Disc Surface
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Construction: Billet Aluminum Cover, Sprung Ceramic Disc with 8 Pucks
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Origin: Not Specified
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Power Gains: 170% Increase in Holding Capacity
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Tuning Required: Recommended for optimal performance
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Engagement: Street-friendly with rapid engagement and minimal chatter
Key Benefits
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Performance: Significantly increased clamping force for reliable power transfer under high torque
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Durability: Sprung ceramic disc designed for rapid heat dissipation and long-lasting wear
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Fitment: Compatible with stock single disc flywheels and OE-style clutch covers for straightforward installation
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Pedal Feel: Modified pressure plate pivot point offers a pedal feel slightly heavier than stock but still manageable for street use
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Weight Savings: 10% lighter billet aluminum cover reduces rotating mass for quicker engine response
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Adjustability: Works with factory hydraulics and benefits from hydraulic release bearing and master cylinder upgrades
What's Included
- 1× Clutch Masters FX400 8 Puck Single Disc Clutch Kit
- 1× Heavy-Duty Sprung Ceramic Disc (8-puck configuration)
- 1× Billet Aluminum Short Shift Clutch Cover
- 1× OEM or Better Release Bearing
- 1× Pilot Bearing (if applicable)
- 1× Alignment Tool
- 1× Instruction Card
- Decals
Installation & Compatibility
Installation of the Clutch Masters FX400 8 Puck Clutch Kit is moderately challenging and generally recommended for those with mechanical experience or professional installation. It bolts directly to stock single disc flywheels or compatible aftermarket OE-style flywheels, maintaining factory hydraulic system compatibility. For best results and to maximize clutch performance, upgrading to Clutch Masters’ internal hydraulic release bearing and master cylinder is advised. Tuning is recommended to accommodate the increased holding capacity and ensure smooth engagement. This clutch kit is not recommended for stock or near-stock vehicles due to the aggressive ceramic disc material, which may reduce clutch life if used improperly.
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Professional Installation: Recommended
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Modifications Required: None beyond standard clutch replacement procedures
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Verify Compatibility: Confirm fitment for your specific year and trim level before purchase
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