dont want to be a kill joy but the intercooler from radtec for the focus ST is even bigger than this one, anysize intercooler will not give you 1bhp extra, just help keep temps down, in not so sunny england a 3inch downpipe will give a real power gain forget a catback (sounds better) but does nothing or a 100cell sportcat which keeps your dashboard iluminated. ED30 ecu upgrade 3" turbo downpipe is the way to go.
remap,full exhaust and intercooler is the only way to get 330hp on this ed 30 machine.It doesent have to be in the tropics to get use for the intercooler,its a must to get the inlet turbo temp down when you push the turbo pressure up.Also very important is a new exhaust all the way from turbo,i have 3 inch all the way on my machine with 100cell sportcat and it doesent give me any lights on the dashboard!So it doesent matter if you live in England or any place in Scandinavia to get use for the intercooler.This Oettinger intercooler gives 10-15hp extra because you can remap it harder.Oettinger have tested this intercooler and its good for over 350hp,but i can tell you guys that 330hp is good enough.My car handels the hp very good must i say,no torque steer just some wheels spin in 2,3,4th gear

.The car is just amazing to drive
And i live by the see in Gothenburg here in Sweden and we dont have so much snow,just rain and rain here
Oettinger is the way to go
