Proportioning valve is adjustable between 100 and 1,000 psi with a twist of a knob and can reduce pressure up to 57 percent. It allows you to 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. Inlet and outlets are 1/8" NPT.
