Soft Caterpillar 5751372-00. C-12 MEUI Tier 2,6-cylinder, 36 cam, 48 crank,297hp (221kW) @ 1720 rpm,1111 ft-lb (1507 N-m) @ 1200 rpm,Test specs 0K5667 and 0K5668 C-12 Marine IMOII