i've started turboing my xr6, my goal is 400rwkw's eventually, but for now i'll aim for about 250, just to get everything running right, i'll be using 55lb siemens injectors and a walbro fuel pump for now, now i just need to know what fuel pressure reg to use? turbosmart etc? would like part no's if possible, it will all be running on a EMS 8860 ecu

cheers in advance

Use the stock one.

yeh stocker should be fine.

if u want 400rwkw later. u should just buy a 044 pump and some 83lb injectors now and be done with it.