Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3979493 found under Master Cylinder Kit by General Motors Corp. The National Stock Number assigned to this part is 2895011931098, and the Federal Supply Class is 2895 Miscellaneous Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3979493.