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The last LS4 variant has these .......
LS4 variant has different layout configuration based upon day
coach format. The partition frames have been lowered in heights
and only longitudinal luggage rack arrangement on the both the
side...
more...

walls has been kept. Shalimar springs in primary suspension
and secondary (outer) suspension have been provided. Stiffer
spring in secondary (inner) suspension has been used. With
these modifications, the payload capacity is expected to increase
to 20.6 T and overcrowding capacity to 260 Nos. The oscillation
trial for this configuration is to be conducted by RDSO. It is
expected that LS coaches under production plan 2014-15 would
be manufactured with this variant.