Kawasaki doesn't sell its own propulsions in the United States. The MITRAC propulsion for the R142As and R143s were chosen before Bombardier bought AdTranz, so I'm not sure if Kawasaki would use a propulsion from one of its chief competitors for the new R188s. Kawasaki and Alstom seem to have a good relationship, so perhaps they could choose Alstom propulsion. Siemens is another possibility as well.