A disc brake combination valve is a necessity when doing a drum to disc conversion.  The combination valve will provide all the valving necessary in the system.  Combination valves perform four functions...(1) Proportioning, (2) Metering, (3) Residual Pressure, and (4) System Failure Warning.

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. 

This also includes the left Side Bracket Mounting Kit, which allows you to mount this to the Left (Driver's Side) of the master cylinder.

Additionally, this  includes two hard lines that connect the master cylinder (with 1/2" & 9/16" ports) to the proportioning valve. 

Kit includes:

• Black 8" Single Diaphragm Power Brake Booster
• Black Bail Top Corvette Style Master Cylinder
• Black Disc/Drum Proportioning Valve with Side Mounting Bracket and Lines
• Firewall Mounting Brackets
• Truck Booster Linkage Rod (3/8-24 Thread) w/ Grease Fitting

Note:  May require drilling two holes in firewall to attach booster bracket.

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