| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| MOOG | 6556 | Direct Cross Interchange | 7 |
| TRW | CS6556 | Direct Cross Interchange | 2 |
| McQuay-Norris | FCS6556S | Direct Cross Interchange | 2 |
| GM | 463872 | Direct Cross Interchange | 2 |
| ACDelco | 45H0183 | Direct Cross Interchange | 2 |
| GM | 362195 | Direct Cross Interchange | 2 |
| GM | 362194 | Direct Cross Interchange | 2 |
| PARTS MASTER | 6556 | Indirect Cross Interchange | 3 |
| MONROE | U6556S | Indirect Cross Interchange | 1 |
| MOOG | 6558 | Indirect Cross Interchange | 1 |
| RAYBESTOS | 5851183 | Indirect Cross Interchange | 1 |
| PERFECT CIRCLE | 2773231 | Indirect Cross Interchange | 1 |
| PERFECT CIRCLE | 2773084 | Indirect Cross Interchange | 1 |
| ROADMATES | 110419 | Indirect Cross Interchange | 1 |
| ROADMATES | 110418 | Indirect Cross Interchange | 1 |
| Husky Spring | RC6556 | Indirect Cross Interchange | 1 |
| GM | 362192 | Indirect Cross Interchange | 1 |
| SEALED POWER | 8316556 | Indirect Cross Interchange | 1 |
| QUALIS | FCS6558S | Indirect Cross Interchange | 1 |
| PARTS MASTER | 6558 | Indirect Cross Interchange | 1 |
| GM | 463871 | Indirect Cross Interchange | 1 |
| NAPA | 2773231 | Indirect Cross Interchange | 1 |