if your doing the conversion on an mk4 escort you use standard caliper spaced out on brackets with 2wd discs and on a mk3 fiesta use mk5 escort calipers of say a gti, rs2000 or xr3i or any mk5 that ran 260 discs as standard with 4wd discs or you could use brackets to space out standard fiesta turbo caliper with 260mm discs of mk5 escort from above hope that makes sense