Fuel pump in dual pump 1987 car??

[mms16]

I have an ’87 is with the two fuel pump design. I am having some problems (loss of power, especially with low fuel levels) that are symptomatic of failing fuel pump/clogged filter etc. I just got a new (well almost new) in tank pump from a 1991 325i. I will be replacing the rear seat this weekend and was wondering is the in-tank pump in the 1991 (single pump car) the same as the in–tank pump in a dual pump car??

Also, where can I find the fuel filter on my car? (1987 325is)

Is it hard to replace the fuel lines? What size are they (I have heard 5mm / ¼”)? How much does a fuel filter cost, and do the Kragen ones work??

Any help would be greatly appreciated….

[Yurick]

MMS,
The fuel filter should be located on the driver's side of the car, just in front of the rear tire. It is not very difficult to change - just a bit messy (with spilled gasoline).