Clutch Masters 06-07 Mazda Miata 2.0L 6spd FX350 Clutch Kit
Clutch Masters 10063-HDFF is the FX350 clutch kit for the NC Mazda MX-5 Miata with the 2.0L engine and six-speed manual. Our listing names the 2006-2007 cars. It is built for an NC that has been turbocharged, supercharged or heavily tuned and now slips when the power comes on, or for a car that runs track days and keeps cooking a stock-style organic disc. Clutch Masters rates the FX350 at a 110 percent increase in holding capacity over stock.
The NC was sold with a five-speed manual on base cars and a six-speed on upper trims, both behind the 2.0L MZR four-cylinder, and the clutch parts are specific to each gearbox. In the six-speed car the clutch is a single-plate design on a flywheel, released hydraulically by a master and slave cylinder. The FX350 replaces the factory parts with Clutch Masters' Power Plus I high-leverage heavy-duty pressure plate and a segmented Fiber-Tough disc. Fiber-Tough is a steel-backed segmented friction material that Clutch Masters says closes the gap between grip and drivability. The disc keeps a heavy-duty sprung hub and a marcel spring wafer, which cushion engagement and driveline shock.
The maker positions the FX350 one step above its FX300: slightly more holding capacity, slightly more aggressive engagement, and some chatter. Its stated target is a serious street car that sees weekend track time, running a highly tuned naturally aspirated engine with cam or head work, a medium-boost turbo or supercharger, or up to 100 hp of nitrous. A car with only an intake and exhaust does not need this much clutch, and a big-boost build may need more.
First make sure the hydraulics release fully. A slave cylinder leaking at the boot, low fluid in the reservoir, or a pedal that does not return can all cause slip or poor release that looks like clutch wear. Then do a full-throttle pull in fourth from low rpm, ideally with a data log; engine speed pulling away from road speed means the disc is slipping. Before installing any new clutch, check for oil at the bellhousing from the rear main seal. Our slipping diagnosis guide explains the road test, and flare versus slip helps separate a clutch problem from a tuning one.
Our listing covers the 2006-2007 NC Miata 2.0L six-speed. Clutch Masters' own catalog lists 10063-HDFF for 2006-2015 Miata MX-5 2.0L six-speed cars, so the same kit is cataloged for later NC model years too. It does not fit NC cars with the five-speed manual or the automatic, and it does not fit earlier NA and NB or later ND Miatas. If your NC is a five-speed, it needs a different clutch, such as the ACT ZM5-HDSS five-speed kit. Count the gears on the shift pattern if you are unsure, and send us your year and VIN before ordering if the car has been swapped. Other NC options are in our clutch and rebuild kit collection.
If the car is mostly driven on the street, the 10063 Stage 2 Steelback Brass Plus kit is another six-speed option to compare.
| Brand | Clutch Masters |
| Part number | 10063-HDFF |
| Fits | Clutch Masters 06-07 Mazda Miata 2.0L 6spd FX350 Clutch Kit |
| Vehicle fitment | Mazda Miata (2006-2007) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
If it is a 2.0L six-speed manual, Clutch Masters catalogs 10063-HDFF for 2006-2015 NC six-speeds. Our listing title names 2006-2007, so send us your year and VIN and we will confirm before it ships. Five-speed and automatic cars need a different part.
Look at the shift knob pattern: a six-speed shows six forward gears. The trim level can also help, since base cars typically had the five-speed, but the shift pattern is the quickest check.
Clutch Masters rates it at a 110 percent increase in holding capacity over the stock clutch and aims it at highly tuned naturally aspirated cars, medium-boost turbo or supercharger setups, or up to 100 hp of nitrous. Clutch Masters does not publish a single ft-lb figure on the product page.
Clutch Masters says the FX350 has slightly more aggressive engagement than its FX300 and will produce some chatter. Most owners find it manageable on the street, especially after a proper break-in on a freshly surfaced flywheel.
No. It includes the pressure plate, disc, release bearing, pilot bearing where used, alignment tool and instructions. Have your flywheel resurfaced or buy a new one for the NC 2.0L.
Check the rear main seal for leaks, inspect the release fork and pivot, and bleed the clutch hydraulics with fresh fluid. Fixing a seeping seal now protects the new disc.
