| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| NEWTEK | D421 | Direct Cross Interchange | 1 |
| Inwood | S421L | Direct Cross Interchange | 1 |
| AUTO EXTRA | AXOD421 | Indirect Cross Interchange | 1 |
| AUTO EXTRA | AXMD421 | Indirect Cross Interchange | 1 |
| FEDERATED | MD421 | Indirect Cross Interchange | 1 |
| FEDERATED | D421 | Indirect Cross Interchange | 1 |
| FEDERATED | CD421 | Indirect Cross Interchange | 1 |