Outfit your truck to be Ready for the Road Ahead , with the Haldex 1/4" NPT Dual Manifold Dash Valve that provides seamless and efficient control of your air brakes. To provide easier access for daily use and emergency situations, this replacement valve is operated by a hand control that adjusts your brakes' air supply. Fashioned with a heat-resistant Engineering Grade Composite (ECG) body that contains dual buttons for the trailer air supply and the parking brake. FleetPride is your First Click in Heavy Duty .