The Bendix Governor Valve D-2, part number 277486N, is a genuine Bendix air brake valve designed for heavy-duty truck air brake systems. This valve regulates system air pressure, cycling the compressor on and off to maintain proper operating range. It is sold as an individual unit. Call us to confirm proper fit for your specific truck or application.Interchanges:04-51787-0001295293624618C9150178488167476RKN18530277486A factory handling fee of $20.00 per unit is added at checkout.FeaturesGenuine Bendix Governor Valve D-2Part number 277486NRegulates air compressor cut-in and cut-out pressure in heavy-duty air brake systemsSold individually (each)Tech SpecsSold as: Each