The Bendix R-14 Relay Valve, part number K021768, is a genuine Bendix air brake component designed for heavy-duty truck air brake systems. Relay valves control the timing and pressure of air delivery to the brake chambers, reducing brake lag on longer wheelbase vehicles and trailer axles. This valve carries Bendix part number K021768, also catalogued under the combined reference BWK021768. Pro Gear and Transmission sells it as a genuine Bendix part. Call us to confirm this valve is the correct fit for your specific brake system configuration before ordering.Interchanges:BWK021768A factory handling fee of $20.00 per unit is added at checkout.FeaturesBendix R-14 Relay ValveGenuine Bendix part number K021768Designed for heavy-duty truck air brake systemsControls air delivery timing and pressure to brake chambersSold by Pro Gear and Transmission