Hi, the phrases "Korea built" and "US built" refer not to the individual part, but to the manufacturing location of the entire car. In this case, for the CV intermediate shaft that you are inquiring about, it is the exact same part for both the Korea- and the US-built cars, found at this link: https://www.carid.com/kia-oe/cv-intermediate-shaft-mpn-495603q750.html