Stage 3 with 449whp and 490wNm. I already had the r600 intake, do88 intercooler with pipes and milltek 76mm cat back from stage 2.
Additionally I fitted a custom 80mm downpipe with cat, hybrid turbo, stock ttrs spark plugs, autotech hpfp and apr lpfp.
I can only recommend the apr lpfp as it's the one I have in my car and I haven't had any problems with it, also my mechanic told me it was a very easy fit because it included an instructions document with pictures, so you can do it pretty much yourself if you have the tools.