ACT 2006 Mazda MX-5 Miata HD/Perf Street Sprung Clutch Kit
The ACT ZM5-HDSS is the street clutch for a five-speed NC Mazda MX-5 Miata: the 2.0L cars sold as Base, SV, Sport, Club Spec and similar trims from 2006 through 2015. It is what most owners buy when the factory clutch is worn out and they want a little more holding power for an intake, header and tune, or a mild boost kit, without giving up a pedal and engagement that still work in traffic. If the stock disc is slipping on the highway on-ramp or the pedal engages at the very top, this is a sensible next clutch.
The NC is front-engine, rear-drive, so the clutch bolts to the back of the 2.0L MZR engine and drives the transmission input shaft, which rides in a pilot bearing in the crank. ACT's MZ032 Heavy Duty pressure plate raises clamp load with a stiffer diaphragm that is heat treated in four stages, and the 3000212 Performance Street disc uses a high-copper organic facing on a steel backing with a sprung hub. The organic material grabs smoothly and tolerates daily slipping in traffic better than a pad-style race disc.
ACT rates the kit at 281 ft-lb measured at the crank, 34 percent more than the OE clutch, and describes the feel as light to moderate pedal effort with smooth, positive engagement and OE to mild gear rattle. The disc is 224 mm (8.8 in) on a 0.9375 in input shaft. That is plenty of headroom for a naturally aspirated build and for many low-boost setups, while keeping the car pleasant to drive every day.
Check the hydraulics first. Look at the fluid level and color in the reservoir that feeds the clutch master cylinder and check the slave cylinder for leaks, since a soft or sinking pedal causes grinding that is not slip. For slip, a loaded test in fourth gear from low rpm at full throttle will show the tach running ahead of road speed. Our slipping diagnosis guide covers how to read it, and the manual vs automatic repair cost guide helps set a budget for the job.
Our listing names the 2006 MX-5 Miata. ACT's application table for ZM5-HDSS covers the 2006 Base, Club Spec and Touring, the 2007-2009 SV, the 2007-2015 Sport, and the GS and GX trims sold in Canada, all with the 2.0L engine. ACT also notes it is for five-speed applications only. The six-speed NC trims use the ZM4 part number with a different disc and alignment tool, so count the gears on the shifter and check for a gearbox swap. If you are not sure, send us the year and VIN. The six-speed street version is the ACT ZM4-HDSS.
| Brand | ACT |
| Part number | ZM5-HDSS |
| Fits | ACT 2006 Mazda MX-5 Miata HD/Perf Street Sprung Clutch Kit |
| Vehicle fitment | Mazda Mx-5 Miata Hd/Perf (2006) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists it for five-speed NC cars only. Six-speed trims use the ZM4 kits. Count the gears on the shift knob or send us your VIN.
ACT lists 2006 through 2015 NC MX-5 Miata 2.0L cars by trim, including the 2006 Base, Club Spec and Touring, 2007-2009 SV and 2007-2015 Sport.
ACT rates it at 281 ft-lb at the crank, 34 percent over stock. That covers naturally aspirated builds and many low-boost setups.
Yes. The kit has the PB1030 pilot bearing, RB110 release bearing, AT05 alignment tool and pressure plate bolts. The flywheel is sold separately.
ACT recommends 300 to 500 miles of mild engagement, such as city driving, before racing or spirited driving. Overheating it early can glaze the disc.
