The SR. N4, for example, has been lengthened by 17 metres, as a result of which its capacity increased to 416 passenger seats and room for 60 cars.
Umzekelo iSR, N4 yenziwe yande ngeshumi elinesixhenxe leemitha, ngenxa yoko umbilini eginya ngawo unyuke waya kuthi ga kumakhulu amane aneshumi elinesithandathu lezichopho zabakhweli negumbi leenqwelo ezingamashumi amathandathu.