Defo the way to 250bhp+..

The AGU injectors are fine for the Ko3s @ 21-22psi (some people say they are not, but they dont take into account the fuel pressure scale vs boost and the increased flow, at 6000+rpm there is over 5+bar behind them) But to run a k04-001 to its optimum perfomance you will need to upgrade the injectors and fuel pump to cope and match the air volume of air higher up the band. It would also be a good idea to get some kind of upgrade charge cooling in the system, FMIC or liquid cooler.
The KO3-001 car be mapped to run lower boost to work with the stock fuel delivery, 230bhp/250+lbft all day long as there is room to play with the VE window, where the ko3s VE is ballsed out at 230bhp.
Nick