It was hiflowed by GCG in Sydney, not sure if it was a completely std turbo to start with, it came on the car. From memory it went from 50/7? to 56/76 but I could be wrong there, I gave all the paperwork to the person who bought it off me. I also had other mods that allowed the 250rwkw to be made [fmic, pfc, tomei cams, dump, exhaust, hiflow cat, z32, etc etc]. But as I said I didn't like its power delivery, was not as progressive.
The 3076 makes 50kw more power but has a much better power delivery and more of it [in the rev range] where you need it.
If I was you I'd send Stao from Hypergear a PM and get one of his units, only ever heard good things about his product.