Not an ecoboost. Basically the Mustang engine derived from the original 3.5L Cyclone engine.
Mild tuning is possible, Unleashed will do it. IDK if Livernois will. Most of the improvement is in transmission behavior, some in power/usable power. The BBK TB for the Mustang 3.7 will likely fit on there, will give it additional responsiveness.
AFAIK, there are no downpipe options sadly for the transverse 3.7.