Most of the name brand
FPR's work ok, Aeromotive, turbosmart, Sard, Tomei, Fuel lab, etc i have used with e85 well past 500hp and stock fuel lines, i would suggest though that is your serious about a competent fuel system you should be running a surge system/tank.....it will become big problem with a standard mounted pump.
I don't think fuel heating will be much of a issue with a single 450, in Australia we run 35-38 degree days on dyno with-out issue with fuel heating(with bigger pumps/multiple pumps even)....and even 40+ on street, if your worried put a cooler in return line.
4mm2 wire is only just good enough....how long is it, do the math.
Again your no where near the limit of your fuel lines, a lot of people around here used to run all day everyday 500hpatw with a old 255 walbro and 8mm line in subarus and nissans etc........and you'll never be with a 16g turbo
