So after hours of searching it seems like I can't seem to find anything on fuel systems for higher horsepower Honda's.
I know that I intend to run a Walbro 255lph intake fuel pump, and a Bosch 044 Inline fuel pump.
What I need to know is what size fuel lines and fittings I'm buying, and also what Fuel filter.
This is gonna be a built b20V, shooting for 600-700hp, but hopefully a tad over 700.
I'm already prepared for the flaming, just if you're gonna flame at least answer the question while you're at it.

 

I'm pretty sure with those pumps you can run stock lines for up to that power level. But if you want to change them out a -6an should be sufficient. If you end up running new lines put a 10 micron filter between the walbro and the Bosch or just after the Bosch