Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 258387C1 found under Pipe Exhaust by Navistar Intl Corp. The National Stock Number assigned to this part is 2990000016320, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 258387C1.