Clutch Masters 15-23 Ford Mustang 2.3L EcoBoost FX400 6-Puck Sprung Disc Clutch - 515ft/lbs Torque
Clutch Masters 07775-HRC6-X is the FX400 6-puck sprung ceramic clutch kit for the 2015-2023 Ford Mustang with the 2.3L EcoBoost and the six-speed manual. It is built for the S550 EcoBoost that has been tuned, given a bigger turbo or run on ethanol blends and now slips the factory clutch, and it is rated by Clutch Masters at an estimated 515 ft-lb of torque capacity.
The 2.3L EcoBoost left the factory at 310 hp and 320 lb-ft, and the clutch behind the Getrag-supplied MT82 six-speed was sized for roughly that. A tune alone adds a large chunk of torque at low rpm, which is exactly where a turbo four loads the clutch hardest, so slip in third and fourth under full boost is common on modified cars.
The FX400 pairs the Clutch Masters Power Plus I hi-leverage heavy duty pressure plate with a sprung ceramic button disc, and Clutch Masters rates it at a 170 percent increase in holding capacity. This listing is the 6-puck version. The six paddles have no marcel cushion, so the disc grabs fast and may chatter slightly in first and reverse. The sprung hub takes some of the edge off compared with a rigid race disc, but this is a race and street kit, not a commuter clutch.
Clutch Masters is clear that ceramic discs are about holding power and durability, not service life, and that they are never recommended for stock or near stock cars. If your EcoBoost is only lightly modified, the FX100 kit for the same car is listed at 415 ft-lb and will be far easier to live with in traffic.
Do a load test in fourth from about 2,500 rpm at full throttle and watch the tach against the speedometer. A true clutch slip shows rpm rising while speed lags. Rule out the hydraulics first, since a weak slave or master cylinder or old fluid can keep the pressure plate from fully clamping. Check for oil at the bellhousing from a rear main or input shaft seal, which will contaminate any new disc. Our slipping diagnosis guide walks through the road test, and shift flare vs slip explains what slip looks like on the tach.
Clutch Masters lists 07775-HRC6-X for the 2015-2023 Mustang 2.3L EcoBoost 6-speed, and our listing covers the same years. The most important point: this kit will not fit the factory EcoBoost flywheel. Clutch Masters designed it around a larger disc than the car came with, and it must be used with their FW-023-SF flywheel, which is not included here. Budget for that flywheel before ordering. If the car has had a transmission swap or a previous aftermarket clutch, send us your year and VIN and we will confirm the parts stack.
For builds headed well past 515 ft-lb, a twin disc such as the McLeod RST twin for the EcoBoost Mustang spreads the load over two discs and includes a steel flywheel.
| Brand | Clutch Masters |
| Part number | 07775-HRC6-X |
| Fits | Clutch Masters 15-23 Ford Mustang 2.3L EcoBoost FX400 6-Puck Sprung Disc Clutch - 515ft/lbs Torque |
| Vehicle fitment | Ford Mustang (2015-2023) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. Clutch Masters states this kit will not fit the factory EcoBoost Mustang flywheel because it uses a larger disc. It must be used with the Clutch Masters FW-023-SF flywheel, sold separately.
Clutch Masters estimates 515 ft-lb for this part, which they describe as a 170 percent increase in holding capacity.
It can. Clutch Masters warns that the 6-puck has no marcel cushion, engages very quickly and may chatter slightly in first and reverse. The sprung hub helps, but expect a firmer feel than stock.
No. Clutch Masters says ceramic discs are never recommended for stock or near stock cars. A lightly modified car is better served by the FX100 kit.
The 2015-2023 Mustang with the 2.3L EcoBoost and six-speed manual. It does not apply to the V6, the 5.0L GT or automatic cars.
