Stainless steel brake lines will dramatically increase the performance and feel of your braking system. The factory builds the car with rubber lines that expand under pressure. This leads to some of the pressure being exerted on a place other than the pad against the rotor. With the stainless steel braided lines, this pressure does not get wasted in the line. Instead, it transfers all the pressure onto the brake caliper ultimately allowing the brakes to do what they're designed to do. Pedal feel is much more crisp and direct.