| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| DURA | BP621S | Direct Cross Interchange | 1 |
| BECK/ARNLEY | 0821482 | Indirect Cross Interchange | 1 |
| ORIGINAL ENGINE MANAGEMENT | 7497D621S | Indirect Cross Interchange | 1 |
| IAPCO | BP621 | Indirect Cross Interchange | 1 |
| OE | 7497D621S | Indirect Cross Interchange | 1 |
| GUARDIAN | G61621 | Indirect Cross Interchange | 1 |
| FMSI | 7497D621 | Indirect Cross Interchange | 1 |
| CENTRIC | 10106210 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2762102 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2762101 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2562102 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2562101 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 1562112 | Indirect Cross Interchange | 1 |
| AMERICAN REMANUFACTURING | 763D621 | Indirect Cross Interchange | 1 |
| BENDIX | D621S | Indirect Cross Interchange | 1 |
| BENDIX | D621 | Indirect Cross Interchange | 1 |
| WAGNER | ZD621 | Indirect Cross Interchange | 1 |