Seeing as how livernois and 5 star tuning have both made over 300whp on a stock truck on 93 octane I think the only thing needed to hit or get close to the 350 mark would be a catless turboback and an e30 tune.
You might be able to tighten up the wastegate actuator but I wouldn’t. You would...
The fact that no company has any type of drop for these trucks yet is one reason I haven’t pulled the trigger on one yet. I hate the stock rake look.
Has anyone played with e30/e40 tuning yet? These trucks seem to gain a lot on 93. With my experience in the Focus ST world we usually see 15-20whp more than a 93 tune with a good e30 tune.