Black Braided 4AN hose is the lightweight and modern version of the stainless steel stuff that you're used to. Easy to work with and maintain, it won't cut your hands to bloody pieces! It will take the heat and pressure of a racing engine, however.
Note: USRT uses this line variant in our direct port water/meth kits when the ratio is 70/30 or close. With 50/50 regular 1/4" plastic line is preferred.