Since there isn't a US production ST Fiesta, maybe you mean the Focus ST?
Ah yes, I get those mixed up. They look so similar and even their names look similar. Still, very neat cars. WWW.S197FORUM.COM WWW.S197FORUM.COM
"http://www.sctflash.com/Newsletter/FocusST.html Picked up 23/45 with just a tune. That is pretty impressive. Heat seems to be the major issue with these since the turbo is being worked pretty good at 16psi I believe. I wonder what tuners like KenB and other will get out of it.
Apparently the Cosworth Focus ST at SEMA made 330/323 with Tune, Intake, Exhaust and upgraded IC to cool it down