| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| DASH 4 | CD521 | Direct Cross Interchange | 1 |
| AMS | S521 | Indirect Cross Interchange | 1 |
| AutoZone | D521CT | Indirect Cross Interchange | 1 |
| Morse Brake | CMX521 | Indirect Cross Interchange | 1 |
| OE | 4423715 | Indirect Cross Interchange | 1 |
| OE | 4423575 | Indirect Cross Interchange | 1 |
| OE | 4423 | Indirect Cross Interchange | 1 |
| NAPA | UP7389X | Indirect Cross Interchange | 1 |
| NAPA | SS7389X | Indirect Cross Interchange | 1 |
| CENTRIC | 10905240 | Indirect Cross Interchange | 1 |
| BENDIX | D521CT | Indirect Cross Interchange | 1 |