This is a Brand new GM style Disc Drum self-adjusting proportioning valve kit - complete with the mounting bracket that mounts the valve to the side of the master cylinder. This valve has a quality smooth finish, and this kit is complete with a mount bracket / bolts. Also included are the two hard lines that connect the master cylinder (with 1/2" & 9/16" ports) to the proportioning valve.

This valve is also call a combination valve, as it performs all of the necessary valving functions with a disc brake conversion. Functions include the following:

Proportioning:

As more force is applied to the brakes and the car begins to lean forward, less braking force is needed in the rear.  This valve decreases the pressure to the rear, preventing lock up.

System Failure Switch:

This valve has a system failure switch that will alert you when half of your braking system is not working properly.

These proportioning valves usually list for $130+ individually! 
 

This is a must for any disc brake conversion. 

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