Upgrade your car to a 1 in. dual bore master cylinder with our quick install kit. This kit allows you to upgrade your factory single bowl manual brake car to dual bowl manual brakes in no time. In this kit you receive the brake lines necessary to route from the new master cylinder to your factory distribution block. Additionally we include an adjustable combination valve which will be installed with the hard line supplied. This adjustable valve allows you to fine tune the amount of pressure your rear brakes receive in order to prevent rear wheel lockup. A great kit with a factory look and easy installation!