It should. Those are awesome wheels, though a bit heavy. I think the offset for the oem st rims are 47, that's the only grain of doubt for me, but 42 fits fine on the normal Fiesta...
i not able to put instagram on my i-pad , if you can send me a pic or two.I found a guy in England with a S1600 Fiesta (performance model prior to the ST) with 17" x 8" Tarmacs. The car looks fantastic! There isn't a problem with running a 17" x 8" Tarmac on the ST based on what I have now seen online. The wheels do stick out further than stock, which is good since I think the OE wheels always look like they are too far in. If you are on Instagram, look up user Photos_By_Wilkins to see his Fiesta with the Tarmacs.
i just asked him on instagram i will let you knowthank s for pictures ziggyst but what offset on this one , because i see 2 offset for 4x108 35 and42
weird ???hey says they're 30...?