ok good, ive got some numbers and figures to be looking at now, thanks. Im after mid range performance to be honest, its originally a track car but ive made it road legal so i want it to perform lower down and mid. im staying clear of the cheap chinese copies i think, id rather buy a second hand quality turbo rather than a new turbo which wont last, unless anyone can correct me and say that the copy turbos are of good quality? So do any of the turbos uve listed come standard on any cars? Or are they all pretty much aftermarket upgrades? Cheers