i know some people with evos (a couple that properly broke them in and more that didn't)

they are proned to have problems... natorious for clutch problems and they have the 6 bolt 4G63 (probably the nicest Mitsu engine) but they have their fair share of problems.

if your friend isn't/didn't break the car in properly (which considering his age and likely reason for buying the car, he probably isn't/didn't) he mine as well sell the thing before he puts 15k miles on it, because the maintenance on that thing is going to be out of this world