Braided lines and AN fittings ...

The big advantage is that it's about as strong as steel line and almost as flexible as rubber and it looks great. It is also very abrasion resistant and the fittings are leak free as long as they don't loosen up. NHRA dictate how much rubber line can be on a race car fuel system and IIRC, it's three feet.

Terminating the ends can be a pain (literally, the braid can draw blood), but there are tools to simplify end installation.

-1 AN = 1/16". So, if you want a 3/8" hose, it's -6 AN. AN means Army Navy as this was originally developed for the military.