The ST spoiler is the same on 3 and 5 door models, the one on the boot you purchased is the standard facelift spoiler painted orange, the previous owner must not have liked the ST one
My focus had a stock black rear spoiler when I bought it, and had no gaps in the spoiler but since fitting the ST/ZetecS rear spoiler my Mpg has dropped by 2mpg must be due to the down force drag of the gaps in the spoiler but I much prefer it to the stock one.
Nah, this was fitted from the factory. The ST was a LHD.
Maybe they put on a different spoiler in other countries.. I don't know but i used a picture off google to show the exact one in EO fitted with a 5 door ST.
Sorry to have taken slightly off topic but just thought id share my findings.