Having trouble finding some brake discs for my FD

[Brighton-Rex]

Hi people, I need some help/advice please......

I need some new front and rear brake discs fr my 1992 import FD. But it seems that my car may have one of two different diamter brake discs, either 276mm or 292mm. I gave Mazda my chassis no - FD35 - 109345. And they have told me part number for front discs was FD017325XA. But can\'t tell me which of the two they are. I could just order standard replacements from Mazda but ideally wanted something uprated if possible but can\'t order any until I know which I need

Any ideas??

Ta

[davehg]

dont want to sound stupid but why not measure the ones on the car?