Check the listing for details. Wilwood Style Knob Adjustable Combination Proportioning Valve 260-11179. Condition: New. Listed at 54.95 USD. Universal Aluminum Adjustable Knob Proportioning Valve For Wilwood 260-13190 Universal Valve For Any Master CylinderOne front port can be plugged when only one port is needed for front brakes. This is a Brand New combination prop valve listing. This combination proportioning valve substantially simplifies mounting, plumbing, wiring and brake proportioning adjustments on vehicles with custom brake systems. The combination block maintains full isolation between front and rear fluid circuits and can be used in conjunction with any tandem outlet or dual mount master cylinder assemblies. The rear circuit has a single inlet and single outlet with the adjustable proportioning valve. The front circuit has a single inlet with two outlets. It can be run as a single outlet with one outlet plugged, or used to split the plumbing on its way to the front calipers. This listing includes a bonus mounting bracket. (5) 3/8" Ports(2) Front Ports(1) Rear Port(2) Ports Feed Master Cylinder2 Wire Brake Light Sensor WireSensor Wire Boot(5) 3/8"-24 Brake Line Fittings IncludedBlack Finish