The exhaust gas systems for Euro-6 take a lot of space on the frame of a truck, and especialy in construction that is complicated. In the case of 8×4, 8×8 or like in Holland 10×8 configurations the engineers end up with a huge puzzle where to put things.
MAN has a solution for that problem with a split unit. One very compact part of the installation is placed between axle 1 and 2, and the rest is behind the cab. This way there is plenty of space left for big fuel tanks, extra axles or other parts. This photo is part of a screen shot of a presentation, but i think this is one of the news items of MAN for the Bauma exhibition that opens tomorrow in Munich.