| 22200113 | Cylinder head assembly without valve | Alco / MLW | | |
| 22200115 | 251 and cylinder head with inserts less valves (also listed as 22A71166, 22A71167) | Alco / MLW | | |
| 22200214 | Cylinder head assembly | Alco / MLW | | |
| 22200215 | Cylinder head assembly without valve | Alco / MLW | | |
| 22200220 | 251 and cylinder heads with valves | Alco / MLW | | |
| 22200221 | Cylinder head assembly | Alco / MLW | | |
| 2221092-1 | Nozzle cooling sleeve (also DLW 10240185) | Alco / MLW | | |
| 2221092-2 | Nozzle opening sleeve | Alco / MLW | | |
| 22211815 | Valve seat air 45 degrees stellite (also DLW 10249266) | Alco / MLW | | |
| 22211815-1 | Valve seat insert stellite (also DLW 10240380) | Alco / MLW | | |
| 22211816 | Exhaust valve seat insert (0.10 over size) | Alco / MLW | | |
| 22211817 | Valve seat 30 degrees stellite standard (also DLW 10249254) | Alco / MLW | | |
| 22211817-1 | Valve seat insert weltitte (also DLW 10249140) | Alco / MLW | | |
| 22211818 | Air valve seat insert (0.10 over size) | Alco / MLW | | |
| 22211821 | Valve seat insert 251 and air stellite | Alco / MLW | | |
| 22211822 | Valve seat insert 251 and stellite standard | Alco / MLW | | |
| 2221183 | Valve seat | Alco / MLW | | |