I say try the Lo4xx and Loba flowed head with Rtech custom software.
Id be interested to hear how that went!!
Well it will have a stage 3 head - flowed and big valves.
So you just need proper software then
Also will most likely need.....
Arrow rods, Mahle or Loba pistons, Stage 2 intake, yet another downpipe, yet another intake, HPA DSG upgrades, oil cooler. etc