| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| BENDIX | D921 | Direct Cross Interchange | 4 |
| AMS | SPQ921 | Direct Cross Interchange | 4 |
| MONROE | CX921 | Direct Cross Interchange | 3 |
| RAYBESTOS | PGD921C | Direct Cross Interchange | 2 |
| RAYBESTOS | PGD921M | Direct Cross Interchange | 2 |
| CENTRIC | 1050921 | Direct Cross Interchange | 1 |
| RAYBESTOS | PGD921QS | Direct Cross Interchange | 1 |
| MIDAS | BP1974 | Direct Cross Interchange | 1 |
| GM | 89060358 | Direct Cross Interchange | 1 |
| GM | 88959947 | Direct Cross Interchange | 1 |
| NAPA | AE7822M | Direct Cross Interchange | 1 |
| MIGHTY | XL921M | Indirect Cross Interchange | 5 |
| BENDIX | MKD921 | Indirect Cross Interchange | 5 |
| AKEBONO | ACT921 | Indirect Cross Interchange | 5 |
| WAGNER | PD921 | Indirect Cross Interchange | 4 |
| WAGNER | MX921 | Indirect Cross Interchange | 3 |
| CENTRIC | 10509210 | Indirect Cross Interchange | 2 |
| WAGNER | ZD921 | Indirect Cross Interchange | 2 |
| BENDIX | L56013M | Indirect Cross Interchange | 1 |
| BENDIX | L56012M | Indirect Cross Interchange | 1 |
| BENDIX | D921CT | Indirect Cross Interchange | 1 |
| MONROE | DX921 | Indirect Cross Interchange | 1 |
| RAYBESTOS | ATD921C | Indirect Cross Interchange | 1 |
| FMSI | 7822D921 | Indirect Cross Interchange | 1 |
| CENTRIC | 10609210 | Indirect Cross Interchange | 1 |