Clutch Masters FX350 Clutch Kit – 2018-2023 Subaru WRX FA20 6-Speed (Late Build)

Part Details:

The Clutch Masters FX350 Clutch Kit is a high-performance street clutch designed for mid 2018 through 2023 Subaru WRX FA20 6-speed owners who have outgrown the factory clutch. With 110% increased holding capacity over OEM and a torque rating of 480 ft/lbs, the FX350 is built for WRX owners running forced induction upgrades, aggressive tuning, or who drive the car hard on a regular basis.

The FX350 uses the Power Plus I Heavy Duty pressure plate paired with a Fiber-Tough full face Kevlar disc. This disc material delivers significantly more holding power than the FX100 or FX200 while still maintaining smooth, street-friendly engagement — without the chatter and harshness of full ceramic disc setups.

This kit is the correct FX350 variant for late build 2018 and newer WRX models, which use a different flywheel specification than the 2015 to early 2018 cars.

Important Note — 2018 Split Year: 2018 is a split year for the Subaru WRX. This kit (15915-HDFF) fits 2018 WRX models with a VIN beginning with J*806877 or later, and all 2019–2023 WRX models. If your 2018 WRX has a VIN number BEFORE J*806877, you need kit 15020-HDFF instead. If you are unsure which kit applies to your vehicle, contact us before ordering. Flywheel is not included. This kit requires an OEM style flywheel or a Clutch Masters flywheel. Kevlar discs require a strict 500 to 750 mile break-in period.

Key Features

• Fits mid 2018–2023 Subaru WRX FA20 6-speed (VIN J*806877 and later)
• FX350 Power Plus I Heavy Duty pressure plate
• Full face Fiber-Tough Kevlar disc for smooth but firm engagement
• 110% increased holding capacity over OEM
• Torque capacity: 480 ft/lbs
• Push type clutch mechanism (WRX specific)
• More street-friendly than ceramic disc options
• Flywheel not included

What’s Included

• Heavy duty pressure plate
• Fiber-Tough Kevlar clutch disc
• Throwout bearing
• Pilot bearing
• Alignment tool

Recommended Supporting Drivetrain Components

• Flywheels – required for this kit — use an OEM style or Clutch Masters flywheel for proper compatibility.
• Transmission Mounts – help reduce drivetrain movement and improve shift consistency under high-torque loads.
• Shifter Bushings – improve shift feel and precision, especially when paired with a performance clutch.
• Drivetrain Components – explore additional upgrades designed to support reliable power transfer.