just done a bit of google investigating

ok the 2wd cossie brakes are 285mm
the 4wd cossie brakes are 278mm
and the rs 2000 brakes are 270mm

so if the rs 2000 brakes are a direct fit with the 4wd callipers and they are 4mm a side smaller then another 3.5 mm should not make any difference should it,?????

someone must have tried these buggers on there fiesta some time surely???