| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| DURA | BP721S | Direct Cross Interchange | 1 |
| WAGNER | ZD721 | Indirect Cross Interchange | 1 |
| BECK/ARNLEY | 821554 | Indirect Cross Interchange | 1 |
| BECK/ARNLEY | 0821554 | Indirect Cross Interchange | 1 |
| ORIGINAL ENGINE MANAGEMENT | 7589D721S | Indirect Cross Interchange | 1 |
| IAPCO | BP721 | Indirect Cross Interchange | 1 |
| OE | 7589D721S | Indirect Cross Interchange | 1 |
| GUARDIAN | G61721 | Indirect Cross Interchange | 1 |
| FMSI | 7589D721 | Indirect Cross Interchange | 1 |
| CENTRIC | 10107210 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2772101 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2572102 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2572101 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 1572112 | Indirect Cross Interchange | 1 |
| AMERICAN REMANUFACTURING | 763D721 | Indirect Cross Interchange | 1 |
| BENDIX | D721S | Indirect Cross Interchange | 1 |
| BENDIX | D721 | Indirect Cross Interchange | 1 |