Hi,
some further suggestions for retrofitting:
Golf MK8 GTI/GTD/R seats
Golf MK 8 underbody aero parts
Golf MK 8 GTI heated steering wheel
Predictive ACC (pACC)
356 mm drilled front brake discs from Golf 8 clubsport/R (or the 340 mm drilled discs from MK 7 TCR)
Ferodo DSP brake linings
Better...