Do you want 300bhp or whp? What are you putting this project into? If you get the 3ed gen 3s you can achieve 300bhp with the stock turbo. I would think you would need a pretty good standalone and some tunning to achieve that at the wheels. Good luck. If you got anymore questions check out Celicatech.com. Theres a guy on a 2nd gen with 300+ hp, but thats with a t304 turbo on it.