These stainless steel braided brake lines are available as a direct replacement for your factory 2011+ Mustang brake lines or for use with aftermarket performance brake kits. Unlike factory rubber brake lines, these brake hoses do not expand and therefore keep the pressure constant for improved brake pedal feel and improved braking performance. 2011+ Mustang brake line kits are available from Russell, StopTech and Maximum Motorsports are DOT approved in most cases. They are easy to install and are highly recommended to help improve your Mustang braking system.