took the fuel pump out of the silvia, its ment to have a walbro but not to sure if its just the standerd one, cant see a name or a part no. on it heres some pics of it
Picture links not working
DeanS15
My car is so clean you could eat off it.
If it's just a yellowish zinc coated cylinder with nothing marked or stamped on it I'd fit a walbro or similar just to be sure 
a walbro will be silver in colour and have "Made in USA" on it i could be wrong but going from memory, i think that the name WALBRO is on there somewhere too the letters will be arched
Only saw this thread just now Paddy, ill get them pics pm'd to you later
hope these pics work
theres the writing off the side of it
a42-621b70
12v 3619
unisiajecs
made in japan
theres the writing off the side of it
a42-621b70
12v 3619
unisiajecs
made in japan
Well Paddy, as soon as i saw that i thought gtr.... and a quick look on the net its out of an r32 gtr