Caterpillar, 621B, Wheel Loader, Radiator Core (A-8346,4N4342, 8N5979, 225171) 42 x 40 x 5 3/16, 7 Row Z Core, Headers : 8 7/8 x 42 3/8 44, 44 Bolt holes, Gaskets 5s-4649 x 2,9m-3116 x 1, 4n-1419 x 1,4n-1418 x 1,6n-4935 x 1, 6n-4936 x 2