| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| BENDIX | MKD921 | Direct Cross Interchange | 1 |
| MONROE | DX921 | Indirect Cross Interchange | 1 |
| BOSCH | BP921 | Indirect Cross Interchange | 1 |
| RAYBESTOS | PGD921M | Indirect Cross Interchange | 1 |
| AKEBONO | ACT921 | Indirect Cross Interchange | 1 |
| WAGNER | MX921 | Indirect Cross Interchange | 1 |
| AIMCO | SPM921S | Indirect Cross Interchange | 1 |
| ACDelco | 17D921M | Indirect Cross Interchange | 1 |
| AMS | SPQ921 | Indirect Cross Interchange | 1 |
| FEDERATED | MD921 | Indirect Cross Interchange | 1 |
| GM | 89060358 | Indirect Cross Interchange | 1 |
| GM | 88967243 | Indirect Cross Interchange | 1 |
| GM | 88959954 | Indirect Cross Interchange | 1 |
| GM | 88959947 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PR921 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | CL921 | Indirect Cross Interchange | 1 |
| NAPA | AE7822M | Indirect Cross Interchange | 1 |
| MIGHTY | D921 | Indirect Cross Interchange | 1 |
| FMSI | 7822D921 | Indirect Cross Interchange | 1 |
| CENTRIC | 10609210 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2492102 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 1492112 | Indirect Cross Interchange | 1 |