My turbo has blown and I have decided to oreder a VXR unit from Courtenay. They are doing me it for a good price or do I think anyway (Cheaper than Regal). Anyway I dont really know much about the units apart from they are stronger and more tunable than the standard Z20LET units. I have ordered the complete unit inc manifold and VXR actuator. I understand that there isnt much gains unless you get it remapped, am I right? What sort of tuning can you do once you have fitted this unit and what sort of boost pressures can I run? What can be acheived with the VXR turbo without changing internals?