I was running a TT fuel pump with NA ECU and NA FPC with no problem,and just completed my full TT ECU and TT FPC, upgrade. Also you will need to wire the EFI harness and FPC to make it work properly. I also replaced My NA EFI Harness with a 95 TT EFI harness. However your Z is an NA which will make no difference which pump you use. NA pump is good for 400hp