Wilwood Proportioning Valve - Knob Style

Wilwood brake proportioning valves are adjustable between 100 and 1000 psi with a twist of a knob or the flip of a lever (6 preset positions) and can reduce pressure up to 57 percent. They let you adjust brake bias quickly and easily to compensate for changing track conditions or for big and little tire combinations. Wilwood brake proportioning valves are adjustable between 100 and 1000 psi with a twist of a knob or the flip of a lever and can reduce pressure up to 57 percent. They let you adjust brake bias quickly and easily to compensate for changing track conditions or for big and little tire combinations. Wilwood machines each proportioning valve from billet aluminum and gives it a durable anodized finish.