SSBC Quality Includes Brake Light Switch and Wiring Harness Includes 5 3/16 Stainless Steel Fittings Has Two Inlets From The Master Cylinder Has Two Outlets To The Front Brakes Has One Outlet To The Rear Brakes Used With Dual Bowl Master Cylinders Only This Is NOT A Direct Replacement For Original Blocks Some Modifications To The Brake Lines Is Required Polished Finish If you are having issues with the front brakes having to much stopping power and you want a more equal braking system then this is the adjustable proportioning valve you need. This is the lastest valve design available. Not only is it adjustable by turn the control knob but in also includes a brake light switch. This is a universal proportioning valve and can be used in any brake system. Included are wiring for the switch and 5 stainless steel 3/16 fittings. The valve has 2 inlets from the master cylinder, 2 outlets to the front brakes and 1 outlet for the rear brakes. This valve is to be used with dual bowl master cylinders only.