The cat 450 is the claas 430 for some reason Cat have not used the claas 450 as there 450 model. Claas have 9 models in the lexion range, at present they have MB engines. 405 _170HP, 410 _190HP, 415 _200HP, 420 _220HP, 430 _240HP all 5 walker machines, 440 _250HP, 450 _275HP, 460 _300HP all 6 walker machines and the 480 _400HP.