BigEasy, Mkoth is telling you exactly right. The KT came in a twin turbo version but it was 600 hp factory rated. The NTC-475 CPL 586 ALSO came twin turbo from the factory. Here is a link off the dieselenginemotor.com site that shows a turbo side view.
http://www.dieselenginemotor.com/diesel/engine/Cummins NTC475 Diesel Engine/27
http://www.dieselenginemotor.com/diesel/engine/Cummins NTC475 Diesel Engine/27