Clutch Masters 2015 Subaru WRX 2.0L 6-Spd FX350 Clutch Kit (Needs 2017 Flywheel to fit 2018)
The Clutch Masters 15020-HDFF is the FX350 single disc kit for the FA20 turbo Subaru WRX with the 6-speed manual. Our listing is built around the 2015 car, and Clutch Masters lists the same part number for 2015, 2016 and 2017. It is the kit for a WRX that has outgrown a street clutch: the car is tuned, maybe running a larger turbo or front-mount intercooler, it sees an autocross or a track day now and then, and the stock disc or a mild upgrade is already flaring RPM when boost hits in the upper gears.
Clutch Masters builds the FX350 around its Power Plus I hi-leverage heavy duty pressure plate and a segmented disc faced with its own Fiber-Tough friction material on a steel backing. The disc keeps a sprung hub and a marcel spring wafer, which is why it can still be driven daily. Clutch Masters rates it at 110 percent more holding capacity than stock and says it holds slightly more than the FX300, with a more aggressive engagement and some chatter as the trade-off. They aim it at the serious street driver who also spends weekends at the track with a medium-boost turbo setup.
On the direct-injected 2.0L turbo, the hard part for any clutch is low-RPM torque in third and fourth when the turbo spools early. Fiber-Tough is meant to close the gap between a soft organic disc that wears out under that load and a ceramic puck that is harsh on the street. Expect a firmer pedal and a quicker bite than the FX300; the shudder that comes with it is mostly felt when launching from a stop in first or backing up.
In the box: pressure plate, Fiber-Tough disc, release bearing, alignment tool, instruction card and decals, plus a pilot bearing where the application uses one. The flywheel is not included. Shipping weight is about 20 lb.
Do a fourth-gear pull from about 2,500 RPM on a safe, empty road. If the tach jumps ahead of road speed as boost builds, the disc is slipping. Our slipping diagnosis guide covers the road test, and flare vs. slip explains what you are feeling. Before you buy, look for clutch fluid at the slave cylinder and oil at the rear main seal; either one will make a good clutch slip, and a new disc will not fix it.
Clutch Masters lists 15020-HDFF for the 2015-2017 Subaru WRX 2.0L turbo 6-speed. Our listing title carries a note that a 2018 car needs the 2017-style flywheel to use this kit. Subaru changed the WRX clutch during the 2018 model year at VIN J806877; cars built from that VIN on use different clutch parts and should go with the 15915 series FX350 instead. An early 2018 built before that VIN, or a later car converted to the 2017 flywheel, needs to be checked before ordering. This kit does not fit the WRX STI or the 2.5L 5-speed WRX. Send us the year and full VIN and we will confirm before it ships.
If the car is a street car with a light tune and you want smoother takeoffs, the FX300 15020-HDTZ fits the same WRX with less chatter. For more holding on a high-boost build, the FX400 8-puck 15020-HDCL is the next step up.
| Brand | Clutch Masters |
| Part number | 15020-HDFF |
| Fits | Clutch Masters 2015 Subaru WRX 2.0L 6-Spd FX350 Clutch Kit (Needs 2017 Flywheel to fit 2018) |
| Vehicle fitment | Subaru Wrx (2015) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. Clutch Masters lists this part number for the 2015-2017 WRX 2.0L turbo 6-speed. Our listing title names 2015, but the kit is the same for all three years.
Subaru changed the WRX clutch during 2018 at VIN J806877. This kit is matched to the 2015-2017 flywheel, so a 2018 car can only use it with that earlier flywheel. Send us your full VIN and we will tell you which kit your car needs.
Some. Clutch Masters says it engages more aggressively than the FX300 and will produce some chatter, mostly when pulling away in first or reverse. It still has a sprung hub and marcel, so it stays drivable on the street.
No. The kit includes the pressure plate, disc, release bearing, alignment tool, instruction card and a pilot bearing when the application uses one. Resurface or replace your flywheel during the install.
Clutch Masters rates the FX350 at 110 percent over stock and the FX400 ceramic kits at 170 percent. The FX350 suits a tuned street car that sees occasional track time; the FX400 is for higher boost and harder launches where ceramic engagement is acceptable.
