1.8 T Shopping list

Hello. Winter is approaching faster than I like, wants to completely rebuild my golf in winter. At the moment there is a 1.8T AGU engine in it… But that’s not how it is… Either I’m going to build it a 3.2 liter in again or I’m going to do something on the 1.8t…. So my question is what do I need to get the 1.8T more power??? -What do you think of: -76mm exhaust system with duplex system (see Appendix) -Bikat or rather Rennkat with 100 or 200 cells?? -4 bar petrol pressure regulator -larger injection nozzles( Which one best???) -LLK (What size best under original apron??) -Oil cooler from Mocal or Racimex -Garret GT25 -new Crammer -Wastegate and, of course, at the end, a pasted chip… Does someone in his Gulf or Audi TT have something quiet?? Thanks in advance tips and advice… PS:. No I don’t sell the car and buy with more machine and I don’t trust to be more skilled, so I don’t buy a machine and I don’t have a similar machine.