Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U89966 found under Muffler Exhaust by Briggs And Stratton Corp. The National Stock Number assigned to this part is 2990002697145, 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 U89966.