| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| DASH 4 | CD421 | Direct Cross Interchange | 1 |
| AMS | S421L | Indirect Cross Interchange | 1 |
| AutoZone | D421CT | Indirect Cross Interchange | 1 |
| Morse Brake | CMX421 | Indirect Cross Interchange | 1 |
| OE | F0DZ2001A | Indirect Cross Interchange | 1 |
| OE | E9DZ2001A | Indirect Cross Interchange | 1 |
| BENDIX | D421CT | Indirect Cross Interchange | 1 |