It had a Quaife differential included, along with a 4.06 final drive (??), and had 17x 7 OZed Supertourismo wheels with Pilot Sport 4 tires on them, and Bilstein B8 dampers with Eibach lowering springs.
The interior got some badging, M-Sport logos on the Recaro seats and in the tach, and a leather and alcantata covered factory steering wheel.
It got the Alcon front brakes from the tarmac spec Fiesta R2C/now Rally 4.
ST 200 air intake box with a Pipercross air filter in it, and the Mountune MP215 tune were the only under hood (or bonnet!) mods, as far as I remember.
Supposedly, there was a special high flow back box muffler designed and built by the WRC/Rally 1 team's exhaust system builder added onto the end of the factory system.
Some of the above (brakes, possibly the suspension) was a part of the extra co$t yet, 'Performance Package' option.
Yes, that plastic badge seen on the hatch is still available (I have one on my front grill, opposite side from the ST badge), but not too sure about the other livery stickers/graphics on the body or the gloss black spoiler.