GM Disc/Drum Proportioning Valve for 1/2-20, 9/16-18 Outlets - Walmart.com
POWERWORKS PV2 Brass Combination Proportioning Valve Disc/Drum Disc Front Drum Rear Brake 172-1353 Fit for GM Street Rod Classic Car & Truck - Walmart.com
Front Disc Brake and Rear Drum Brake Line Valve
Drum/Drum Brake Proportioning Valve with Wire Sensor Plug