Clutch Masters FX400 Clutch Kits for a 2018-2021 Subaru WRX Base / Limited / Premium.
170% Increase in Holding Capacity - RACE/STREETThe FX400 System uses the Power Plus I, Hi-Levarage, Heavy-Duty Pressure Plate with a custom and extremely durable, Sprung Ceramic disc. This is the ultimate extreme duty street and/or road/drag racing system. It is available in a 6 or 8 ceramic puck configuration. The 6-puck being the more aggressive setup and 8-puck being the less aggressive. The sprung hub design allows for moderate dampening in high-torque applications, rendering it much more street friendly than solid or rigid designs. This disc is designed for long life, outstanding holding capacity, and rapid heat dissipation.
Features:The FX400 System uses the Power Plus I Pressure Plate with a custom, extremely durable, Sprung Ceramic disc. This is the ultimate extreme duty street and/or road/drag racing system. It is available in a 4 or 6 wing (paddle) configuration, with the 4-wing being the more aggressive setup (please specify which type you prefer). The sprung hub design allows for moderate dampening in high-torque applications, rendering it much more streetable than solid or rigid designs. This disc is designed for long life, outstanding holding capacity, and rapid heat dissipation.
Warning: Due to the solid (no Marcel) friction rivet design, the FX400 disc engages very quickly and may chatter slightly in first and reverse. To help alleviate this problem, we only use premium ceramic friction material.
All stages come as a complete kit including disc, pressure plate, throwout bearing (when applicable), pilot bearing (when applicable), and alignment tool. (Individual components available upon request)

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| CLUTCH KIT PART# GUIDE: #####-HDTZ-A | |
| Pressure Plate Codes: | |
| SD - Custom Single Disc (725 or 850) DD - Double diaphragm pressure plate HD - Heavy duty pressure plate |
HR - High rev pressure plate TD - Twin Disc |
| Disc Codes: | |
| 00 - Sprung steel-backed organic disc B4 - 4-puck rigid ceramic disc. B5 - 5-puck rigid ceramic disc. B6 - 6-puck rigid ceramic disc. BL - Rigid full face ceramic disc. 0C - Sprung Organic/Ceramic disc. C4 - 4-puck ceramic sprung disc. C6 - 6-puck ceramic sprung disc. CL - Sprung full face ceramic disc. CF - Sprung ceramic/Fiber Tough disc. CK - Sprung full face Kevlar/ceramic disc. CT - Sprung segmented Kevlar/ceramic disc. 0F - Sprung Organic/Fiber Tough disc. |
FF - Sprung Fiber Tough disc. |
| Foot Notes: | |
| A - Aluminum flywheel included. S - Steel flywheel included. T - Fits Tremec transmission only. H - Hydraulic slave cylinder included. K - Upgrade kit including flywheel. R - Rigid disc. D - Dampened disc. C - Custom kit. |
P - Clutch/flywheel package deal. M - Modular clutch/flywheel kit. V - Push type conversion. W - Pull type conversion. Y - 6 bolt patern. Z - 8 bolt patern. 1-7 - Unique flywheel identifier. |
| FLYWHEEL PART# GUIDE: FW-###-AL | |
| AL - Aluminum SF - Steele |
FW - Flywheel |
| Years | Make | Model | Trim | ||
|---|---|---|---|---|---|
| 2018 - 2021 | Subaru | WRX | Premium | ||
| 2018 - 2021 | Subaru | WRX | Limited | ||
| 2018 - 2021 | Subaru | WRX | Base |
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For more information on Clutch Masters part number 15915-HDCL, you can visit the official Clutch Masters website.