I hope you all understand that these are for the ST-Line or basic Fiesta and will NOT fit the ST.
Fiesta ST front rotors are 278mm and Focus SVT are 300mm, not a cost effective change.
However, the ST-Line or basic Fiesta the front rotors are only 258mm so there is a bigger difference.
In photo, the rotor on left is OEM Fiesta, on right is Focus SVT.
Photo is for reference, the rotors are not being sold.