there should be a car section here
anyways, one of my friends is big into mitsu cars and evo's happen to be one of his fav. evo's have a great motor and those things can really go when u mod them.
in fact, you could get 300hp w/ bolt-ons like exhaust, MFC, and intake. 4g63 engines respond well with minor bolt-ons.
also, the later evos already have a turbo built in them so if the stock boost level isnt enough for u, just buy a boost controller to get the max power out of them small 16g(the size). the good thing about small turbo's is that there is less lag for them and u can do the 'get up and go' a lot faster than big turbos.
if that isnt enough for you, you can buy bigger turbos and whatnot if you want more power b/c these motors are interchangable w/ a lot of parts like mizzouplaya said.
i could go on lol but i hope that anwers your question.
btw, if u DO get one, they're pretty fast stock and handle great but dont do much body-wise. a lot of ppl tend to make evo's look hella gay w/ wack bodykits.