Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WLR131 found under Main Bearing Kit by Isotta Fraschini Motori Spa. The National Stock Number assigned to this part is 2815151884091, and the Federal Supply Class is 2815 Diesel Engines And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like WLR131.