These were made for the ct9 set ups, for 15 year plus technology they are great when you think about it. The problem is people expect more from them with bigger turbo's when they are not made for them. EMB great for mapping but doesn't remove speed cut plus wires hanging around, glovebox taken up etc. Bigger turbo means your probably going to want speed cut removed or why go bigger? so EMU £600 say then fuel pressure regulator £80 decent one then the drive to tuners average £100 if your not lucky enough to live near one plus fuel for the dyno set up. For a decent set up for eg TD04 say £800 yo