Prepare your semi to be Ready for the Road Ahead™, with the Prima Brake 4-Port 3 psi Emergency Relay Valve that contributes to fast and reactive air brakes. To quickly apply compressed air to the rear air brakes, this replacement component acts as a gateway between the service reservoir and the air brakes. Fashioned with a durable metal body to tolerate extreme pressures and regular use.

FleetPride is your First Click in Heavy Duty®.