Can run 1,2,3 or 4 pumps
Has the capability to have 2 lift pumps fed into it
There's a variety of pumps that can be used Inc Bosch, deatschwerks, walbro pumps and other big brands
If you had the fuel requirements to run 4 x walbro 400lph pumps, you could easily afford to upgrade your charge system.
As Piggaz said I'll just be using 2 pumps which is plenty for my requirements