This set of S.B. International valve stem seals, part number: 122-1373, are made in the USA for Caterpillar engines, the interchange part numbers to CAT are: 102-6229 and 163-2478, there is a full set of 24 valve stem seals. Please review all photos provided and refer to the SBI part number along with the interchange to Caterpillar part numbers provided to ensure fitment and compatibility before making your purchase. Thank you for choosing EKG!