Fueling & Injection - -06 feed for 700rwhp turbo

so i was wondering if i should just go bigger diameter on my fuel feed line. I plan on running twin 255 pumps into a single -6 line and putting a Y at the rails where a -6 line runs into the rear of each rail. i was going to put a bypass regulator at the front of both rails with the return going back into the stock feed line.

i wasn't sure if -6 feed would be adequate but seeing as how most fuel rails would bottleneck a -8 or above feed down to 3/8th or -6 inner diameter at the rail anyway, i figured -6 would be ok as long as pressure holds in the rail.

the goal is to make 700 rwhp on 93octane with this setup.

If you are keeping the stock lines as a cost savings, that is 1 thing....

Buying a new -6 line instead of -8 is a waste of money. It is not much different flow wise than the stock lines, & not much cheaper than -8.

If you are spending your hard earned money, do it right the first time & run a -8 line.