Clutch Masters 2015 Subaru WRX 2.0L 6-Spd FX100 Clutch Kit

The Clutch Masters 15020-HD00 FX100 is the mildest upgrade in the 15020 family for the 2015 Subaru WRX with the 2.0L turbo FA20 and six-speed manual. It is meant for the WRX owner whose factory clutch is worn out, starting to slip in third or fourth under boost, or chattering on takeoff, and who wants a clutch that feels close to stock but lasts longer and clamps harder. It ships same business day from the USA.

What the FX100 clutch kit does in a 2015 WRX

The clutch is the only link between the FA20 engine and the six-speed gearbox, so every pound-foot the turbo makes passes through the disc. Clutch Masters builds the FX100 around its Power Plus I heavy-duty pressure plate and a steel-backed organic disc with a marcel spring wafer, the same friction type the factory uses. The marcel cushion is why engagement stays soft and predictable in traffic. Clutch Masters rates the FX100 at 70 percent more holding capacity than stock and aims it at cars with light bolt-ons such as an intake or exhaust, with only slightly higher pedal effort than factory.

That makes this kit a replacement-plus, not a big-power clutch. If the car has a tune and more boost, step up to the FX200 Kevlar kit (15020-HDKV) or the FX250 (15020-HD0F) instead.

Symptoms that point to a worn WRX clutch

• Revs flare without the car pulling harder when boost builds, usually first in the higher gears
• The engagement point has moved up near the top of the pedal
• Shudder or chatter pulling away from a stop, worse on a hill
• A burnt friction smell after stop-and-go driving
• Bearing noise that changes when you press or release the pedal
• Grinding going into gear, which can also be a hydraulic or synchro problem

How to confirm the clutch is the problem

Do a load check before you buy: fourth gear, about 2,500 rpm, full throttle. If the tach climbs faster than road speed, the disc is slipping. Next, look for the cheap causes. A leaking slave cylinder or air in the line keeps the pedal from releasing fully, and oil on the bellhousing from a rear main seal will ruin a new disc in a few hundred miles. Our slipping diagnosis guide walks through how to tell clutch slip from other drivetrain faults.

Fitment

Our listing is for the 2015 Subaru WRX 2.0L turbo six-speed. Clutch Masters lists the same 15020-HD00 part number for the 2015-2017 WRX 2.0L turbo six-speed. It does not fit the 2.5L five-speed WRX, the STI or the CVT car. Subaru changed parts during the 2018 model year, so a 2018 or later car needs a different kit; ask before ordering if your car is a late build. Match the part number on your old parts or send us your year and VIN and we will confirm. You can compare the other FX stages from this page as well as the FX300 15020-HDTZ.

Install notes

• The kit includes the disc, pressure plate, release bearing, pilot bearing where applicable, an alignment tool and an instruction card.
• Resurface the factory flywheel or replace it. A glazed or heat-checked flywheel is the most common reason a new clutch chatters.
• Pull the old pilot bearing with a slide hammer such as the OTC 1172 puller, and center the disc before snugging the pressure plate.
• Tighten the pressure plate bolts a little at a time in a star pattern to factory torque, then bleed the hydraulic system with fresh brake fluid of the type on your reservoir cap.
• Follow the clutch break-in procedure. Clutch Masters notes that driving style, break-in and lightweight flywheels all affect how long an organic clutch lasts.

Clutch Masters lists the kit at about 20 lb shipped in its own box.

Does the 15020-HD00 fit a 2016 or 2017 WRX?

Clutch Masters lists 15020-HD00 for the 2015-2017 WRX 2.0L turbo six-speed. Our listing is titled for 2015, so send your year and VIN if you want us to confirm a 2016 or 2017 car before ordering.

Will the FX100 hold a tuned WRX?

It is built for stock or lightly modified cars with bolt-ons like an intake or exhaust. Clutch Masters rates it at 70 percent more holding capacity than stock. For a tuned car with more boost, the FX200 or FX250 stages are a better match.

Does the clutch feel different from stock?

Very little. The disc uses organic friction with a marcel spring, and Clutch Masters describes pedal effort as only slightly higher than factory with normal engagement.

What else should I replace with the clutch?

Resurface or replace the flywheel, and inspect the rear main seal and slave cylinder while the transmission is out. The kit already includes the release bearing and alignment tool.

Is there a break-in period?

Yes. Drive gently with no hard launches or high-rpm shifts for the first several hundred miles so the disc and flywheel bed in. Skipping break-in shortens clutch life.

• Transmission Slipping Diagnosis Guide
• Shift Flare vs. Slip: How to Tell Them Apart
• Automatic vs. Manual Transmission Repair Cost