| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| CARQUEST | MD521 | Direct Cross Interchange | 3 |
| NEWTEK | D521 | Direct Cross Interchange | 2 |
| Inwood | S521 | Direct Cross Interchange | 1 |
| AUTO EXTRA | AXMD521 | Indirect Cross Interchange | 2 |
| FEDERATED | MD521 | Indirect Cross Interchange | 2 |
| FEDERATED | D521 | Indirect Cross Interchange | 2 |
| FEDERATED | CD521 | Indirect Cross Interchange | 2 |
| AUTO EXTRA | AXOD521 | Indirect Cross Interchange | 2 |