Sorry to go off topic Harry but I think if you mainly do street driving you will get sick of any big turbo setup with extra lag that what you have now. On my gtt I have a big lagy turbo and it shits me, and also the constant gear changing to be in the sweet spot. But I no what you mean with the gtr and 300kw. These cars just handle the power so nicely and that you know it can take more without turning it into a pig