Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 578 268 C1 found under Muffler Exhaust by Navistar Intl Corp. The National Stock Number assigned to this part is 2990011744164, 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 578 268 C1.