Prepare your semi for the journey ahead with enhanced control of its air brakes, with the OTR MV-3 Style Manifold Dash Valve with Expertise Built In. Due to its ability to open or close as needed, this replacement valve is the ideal option to regulate the amount of pressure in an air brake system. Constructed with durable components and pressure-tolerant design to ensure long-term reliability. FleetPride is your First Click in Heavy Duty.