Just an FYI: If you had a sti, and did a turbo bolt on and some other stuff, and you lost your motor, what would you do. What you have someone sleeve the block and get a new crank and different pistons, or would you just go with a JDM spec motor with more power. Keep in mind emissions is something you'd have to pass, and your looking for longevitve and a reliable ride. What do you think would be the best route. Would a "Built" 2.5 be able to handle 450-500 at the wheels?