The Bendix Relay Valve R-14, part number K203013 (also cataloged as BWK203013), is a genuine Bendix air brake relay valve for heavy-duty truck air brake systems. Relay valves are used to speed brake application and release at remote brake chambers by delivering air pressure locally rather than routing full air volume through a long line from the foot valve. The R-14 designation identifies the specific Bendix relay valve model within this series. Pro Gear and Transmission is your source for genuine Bendix brake components. Call us to confirm this valve is the correct fit for your specific brake system configuration.A factory handling fee of $20.00 per unit is added at checkout.FeaturesBendix Relay Valve model R-14Part number K203013, also cross-referenced as BWK203013Designed for heavy-duty truck air brake systemsFunctions as an air brake relay valve to speed chamber response at remote axlesSold individually as a single unit