GM Proportioning Valve Kit Brake Lines Mounting Bracket Disc/Drum Chrome Description: This is for a brand new CHROME Proportioning Valve and Chrome Side Bracket Mounting Kit with 1/2" Front and 9/16" Rear Brake Lines. This combination proportioning valve is for Disc Drum applications. Package:. It includes the Side Bracket Mounting Kit, which allows you to mount this to the Left (Driver's Side) of any aftermarket or Stock Booster including 7" 8" 9" 10" and 11" sizes. As shown in the picture |