Wilwood Proportioning Valve - GM Style Fixed w/ Delay (Metering Valve)Wilwood's GM style proportioning valve is a direct replacement for 1978 and newer General Motors vehicles equipped with front disc rear drum brakes. Manufactured from high quality aluminum and coated with a durable black anodized finish. Line connections for the valve, if mounted in the OE location, Will allow the original lines to connect directly to the valve. If mounted in a non OE location, fluid lines may have to be modified. This also does allow