These are somewhat older versions of the Wilwood residual pressure valves that can be plumbed inline to help keep you from having to pump the brakes on some braking systems when you add drums or ...

Residual Valve There are two different residual valves. A 10-lb residual valve will maintain line pressure to the rear to keep the drum brake shoes out close to the drums, resulting in a higher ...

Residual valves maintain a small amount of pressure in drum brake systems to keep the wheel cylinder cups expanded. This prevents air from being drawn into the system and allows the brakes to ...

Read the Chevy High-Peformance technical article on installing and tuning a brake proportioning valve, brought to you by the experts at Chevy High Performance Magazine.

Caliper pistons that are not returning properly, or appear to be seized in the bore, can be caused by residual hydraulic pressure keeping the piston applied.