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The SD22ECO is another variant in EMD's ever-growing ECO repower catalog. The program launched by EMD in 2008. The core units' 645 prime mover is removed and a new 2,000 hp, 12-710ECO prime mover is implanted. This variant has had limited sales. KCS and KCSM each rostering two. KCS's two units used SDP40 cores, while KCSM's units used SD40-2 cores.

Who bought what?

KCS (QTY:2) #'s 2600-2601

KCSM (QTY:2) #'s 2650-2651

For photo see here