Oh yeah man, you will.
My first R33 was 100% stock bar rims and springs. It had an assumed 154rwkw. It was fast and had balls.
My current R33 had 170rwkw when I got it. It pulled even harder and was great fun. I then had it run on a dyno for a checkup rather than power figure. They discovered the CAS was out, and after adjusting it correctly it made 190rwkw. This was sooo much better.
Since then I've had new turbo, injectors, fuel pump, coilpacks, and ECU fitted. Now sitting on 294.4rwkw. Shit's crazy yo.