Generally its a inline fuel pump that you use with the standard pump in the tank not as a replacement, there is another Bosch you can use for that but the model number escapes meI use a walbro 255 but think the bosch 040 pump is better, think you can you bosch 044 in tank too
Pretty sure the 040 & 044 can both be used intank but only the 044 can be used as a external pump