are u talking kws or hp? i have a rb25det with work done too it, i have the hks gt2540r and running on 14psi it has 265.9hp on a crappy tune, i have heard by many people that the 2540 on the rb25 can produce up to 350rwhp, as pimpn said im gettin my car re-tuned next week by tenagah motorsport, i will bringing the boost up to 16-18psi depending on what power it has, ill let u know how it goes