Black Disc/Drum Proportioning Valve Kit 9/16" & 1/2" GM Under Floor / Bottom Mount Prop Valve. This is for use with 9/16" and 1/2" Master cylinder Ports (Standard GM). This Kit Includes: Disc/Drum Prop Valve, Black Bottom mount bracket (to fit boosters with 3 3/8" spacing), lines (to fit 9/16" - 1/2" masters), bolts, and wire.
