Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 451879C91 found under Transmission Hydraulic Vehicular by Navistar Intl Corp. The National Stock Number assigned to this part is 2520010251197, and the Federal Supply Class is 2520 Vehicular Power Transmission Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 451879C91.