I'm still curious what the HP limit is with the stock DCT trans. I know that dry clutch design was kinda crap and, from what I can find, the trans is nearly maxed out from factory. That'll be a huge determining factor in how OP moves forward. If you stick with the 2.5L engine, you'll need to find a 5 speed from that year, if you go 2.0 Eco, you'll need that tranny instead.
From what little research I've done on the DCT, it looks like adding any power to it at all is a risky venture.
We dont know the limits of the DCT , I have one that made 323 whp and still pulling
The DCT Clutch design had NOTHING to do with its short comings , Its all software related
The S , SE , Tit , ST Duratecs 2.0 , 2.3 , 2.5 , Ecoboost Blocks 2003 to 2018 all take the same Trans Bolt Pattern
Where are you getting 2.5 From ?
Yes I dislike the ST I have owned a few of them and own one now , My 2002 SVT stock Engine Turbocharged will out run , Out handle ,out brake , Rides better , Looks better , worth close to the same money , lower Insurance and I could go on
The ST is under powered , makes less TQ at 7100 then a NA SE , Under Turboed , over priced , rides like crap , seats such , to heavy , Trans is crap and I could go on
Tom