well i just went to look at the 03 wrx and got it for 27500, its got a few goodies like ecutek, cold air, 3" stainless exhaust, 400hp fuel pump, eibach springs and a decent stereo. I had a look at the dyno read out, 150kw at the wheels, it feels like it has at least that when driven. Seems like a decent amount of power although i was expecting that that particular combination would have made aboude 170rwkw. I guess there wont be much strain on the stock components with that amount of power.