Part Number 637374-C-91 having (CAGE Code 89346) and FSC 4820 Valves Nonpowered in stock with ready to ship. Get an instant quote for 637374-C-91 Parts Kit Pressure Regulating Va by Navistar Intl Corp. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.