I have a Subaru Impreza Sports Wagon GT , Own it now for 4 months .
Was running great and still is ,require help .
It overheated twice in time frame of a month its engine did not cut out ,but steam was present,and discovered a leak in the radiator .
The leak is fix ,the car run like super sonic destroyer ,asking the trottle to open up more and more .
No white gue on the dip stick ,no coffee mixture in radiator.
It can rev 6500 with no efford if required .
Question is must I do the heads , could she have had been damaged.
Presently planning to install performance exhaust system and slap on bigger turbo .
The whole set up ,already have STI gear box.
Any advice .