Are there any differences between the KYB shocks & struts manufactured in the U.S. vs. other countries (like Japan)?

No. All KYB products are designed at the KYB world R&D offices and every KYB manufacturing plant then builds each product to the designed specifications. High volume part numbers are manufactured in more than one plant and in more than one country. Since KYB designs and builds our own manufacturing equipment, we can control and duplicate production specifications which ensures identical performance & quality at every manufacturing facility. Specific product performance is determined by part number, not by where it is manufactured. Product quality is a standard in every KYB part number, in every KYB manufacturing facility.