Winded brake lines from master cylinder to front splitter block?
 

Winded brake lines from master cylinder to front splitter block?
What kind of brake line is it and if is replicable with regular brake line? I'm just replacing long line between front and back splitter block and just would like to know what is it. What is purpose of that braiding (?) at front brake lines and why they wind down instead of going straight. Part of that long line is braided too, part that go across frame.

The curling of the line is to allow the line to flex, the body and frame don't move the exact same way, if it was a solid straight tube it would at the very least kink at some point and at the worst break.

Also, what you're calling a "splitter block" is your HCU (hydraulic control unit, it is what enacts abs) be very very careful because if you get air in the HCU you have to have a scan tool that will go into the abs module and start the abs bleed sequence.

What is purpose of that grease valve at HCU. And what is purpose of that long spring around winded brake lines? And who is psycho who design inverted flare 3/8 and bubble flare metric at another end of brake line that I replaced yesterday.
To add I do not think it is any control unit as I didn’t see any electric wire go from it. I’m not sure if I have ABS at my f 250 99 ld.