Shouldn't have made any difference
Why is the ORIGNAL one capable for the turbo?
What fuel pressure regulator is on the car? How does the tuning place know its struggling with fuel pressure?
The only way to know is check the fuel pressure. It is detailed in the Honda manual. as for plugs go with NGK BCPR7ES or BCPR8ES cheap and reliable.
A new Stock fuel filter will do the job nicely.
As for the fuel pump, its been in there over 15 year so having a new one can only help.