are all 2G fuel pumps the same?

[99 gst 420a dsm]

im looking into a walbr 255lph pump, but i only seethemfor"2G all" so does that mean that allthe fuel pumps are the same? i herd u cant use a stock gst fuel pump in a 420a car, so im lost....

 

[Kirby]

Call howell ang get the High pressure pump for our cars. If you don't buy it from him hwe should at least be able to give a part number.

 

[99 gst 420a dsm]

thanx