check the "fast ford"
Probably not the best source to quote from.
I got an ST170 and I just checked and inlet's at the back (very nice car though)

New mondeo duratec, notice inlet at front exhaust at rear.
ST170 engine notice inlet at the back and exhaust at the front. Also note the RS has exhaust at the front so its a zetec.
all this was covered in a previous post
https://passionford.com/forum/viewto...hlight=duratec
You can read it all there so that we don't have to go through it again.