Product Details: The Haldex 1/4" Vertical Mount Dual Manifold Dash Valve ensures you are Ready for the Road Ahead™, as a high-quality control valve designed to provide efficient and effective control over the braking system. It is easy to install and use. Designed for tractors and trailers, this valve is built with sturdy construction for long-lasting performance control of the braking system. FleetPride is your First Click in Heavy Duty®.