Prepare your semi truck to be Ready for the Road Ahead™, with the Bendix SV-4™ Trailer Release Valve that provides enhanced control of a trailer's brake systems. Due to its ability to activate or deactivate a trailer's brake systems, this replacement valve is able to play a key role in the stopping or slowing down of a cargo load. Manufactured with a solid construction for long-lasting performance. FleetPride is your First Click in Heavy Duty®.