Genuine Mazda Part
Genuine Mazda replacement wheel nut with a 17mm head. These were produced to be used with the Rays alloys that are fitted to the 30th Anniversary Mk4 model as the hole in the wheel isn't big enough to take a standard 21mm socket. The official note from Mazda is that they are for vehicles between chassis number range 400013 > 411258 however the best way to determine whether these are the ones you need is to check the size of your existing wheel nuts. Regardless of what they were intended for, they will still fit all MX5 models as they have the correct taper.
Fits all MX5 models, 1989>