Stainless lines are by no means a necessity for a brake system. They offer a slightly stiffer pedal, more wear resistance, and better bragging rights than standard rubber lines. Most quality stainless braided lines have a teflon liner inside a rubber hose with a stainless jacket over the top.....some DOT approved lines also have a clear vinyl cover over the stainless jacket. This is to prevent the stainless from cutting holes in whatever it might rub up against in the course of its duty. For a high performance brake system, stainless lines are a great addition to complete the performance package.
