| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| BENDIX | MKD921 | Direct Cross Interchange | 6 |
| AKEBONO | ACT921 | Direct Cross Interchange | 6 |
| WAGNER | MX921 | Direct Cross Interchange | 5 |
| RAYBESTOS | PGD921M | Direct Cross Interchange | 5 |
| BENDIX | D921 | Direct Cross Interchange | 5 |
| WAGNER | QC921 | Direct Cross Interchange | 4 |
| MONROE | DX921 | Direct Cross Interchange | 3 |
| MONROE | CX921 | Direct Cross Interchange | 3 |
| WAGNER | PD921 | Direct Cross Interchange | 3 |
| RAYBESTOS | ATD921C | Direct Cross Interchange | 3 |
| CENTRIC | 10609210 | Direct Cross Interchange | 2 |
| CENTRIC | 10509210 | Direct Cross Interchange | 2 |
| BENDIX | D921CT | Direct Cross Interchange | 2 |
| MIGHTY | XL921M | Indirect Cross Interchange | 5 |
| GM | 89060358 | Indirect Cross Interchange | 4 |
| GM | 88959947 | Indirect Cross Interchange | 4 |
| RAYBESTOS | PGD921C | Indirect Cross Interchange | 3 |
| NAPA | AE7822M | Indirect Cross Interchange | 3 |
| FMSI | 7822D921 | Indirect Cross Interchange | 3 |
| GM | 88959954 | Indirect Cross Interchange | 3 |
| GM | 88967250 | Indirect Cross Interchange | 2 |
| ACDelco | 17D921M | Indirect Cross Interchange | 2 |
| GM | 89060375 | Indirect Cross Interchange | 2 |
| GM | 19108021 | Indirect Cross Interchange | 1 |
| MIDAS | BP1974 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PR921 | Indirect Cross Interchange | 1 |
| MIDAS | BP1964 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | CL921 | Indirect Cross Interchange | 1 |
| Morse Brake | MKD921 | Indirect Cross Interchange | 1 |
| CENTRIC | 30909210 | Indirect Cross Interchange | 1 |
| CENTRIC | 1050921 | Indirect Cross Interchange | 1 |
| CENTRIC | 1040921 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2492102 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 1492112 | Indirect Cross Interchange | 1 |
| BENDIX | RS340 | Indirect Cross Interchange | 1 |
| BOSCH | BP921 | Indirect Cross Interchange | 1 |
| RAYBESTOS | PGD921QS | Indirect Cross Interchange | 1 |
| ACDelco | 17D921CH | Indirect Cross Interchange | 1 |
| AIMCO | SPM921S | Indirect Cross Interchange | 1 |
| GM | 89032286 | Indirect Cross Interchange | 1 |
| GM | 88967243 | Indirect Cross Interchange | 1 |
| MIGHTY | D921 | Indirect Cross Interchange | 1 |
| GM | 19180275 | Indirect Cross Interchange | 1 |
| FEDERATED | MD921 | Indirect Cross Interchange | 1 |