the fiesta posted here as a reference is a stock s or se anyway, mine is a totally different design since a custom turbo kit is retrofitted and many parts are "unique"
I will post photos of the underside/ splitter / etc a.s.a.p but I think a "undetray / tire spats" topic should be made to elaborate on the subject since I am also worried about heat retention / extraction
to continue on topic , I am thinking the same "oem look" air dam but in the front of the car ; my car on the bottom pic, see green line for air dam placement