Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WI-6091 found under Air Cleaner Crankcase Emission C by Walker Design Inc. The National Stock Number assigned to this part is 2990014249778, 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 WI-6091.