This kit includes the valve, bracket, and mounting bolt. This mounts on the cylinder stud for disc cars. 69 GM Disc Brake Hold Off Valve. This is the valve that is needed to make your car factory disc brakes. The valve is mounted off the stud of the cylinder and holds off pressure so the rear drums will kick on a second before the front discs. The fluid builds up pressure and once by passes the in the valve applies pressure to the front brakes. If you are making or have a factory disc brake car this valve will make your car correct. No core is required this is a brand new Inline tube reproduction. This valve is exact reproduction featuring a cast body, the correct bracket, black die body and working insides. You will also find with current manufacturing procedures, the reproduction has no tool stamping marks and the edges of the part are much cleaner than the original. Making this a concourse level part.