| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| ACDelco | 17721B | Direct Cross Interchange | 3 |
| AutoZone | 721SG | Direct Cross Interchange | 2 |
| AutoZone | 721PG | Direct Cross Interchange | 2 |
| AIMCO | AFR721 | Indirect Cross Interchange | 3 |
| MOTORCRAFT | BR94B | Indirect Cross Interchange | 3 |
| GUARDIAN | 71721 | Indirect Cross Interchange | 3 |
| FMSI | S7211407 | Indirect Cross Interchange | 3 |
| Inwood | 721 | Indirect Cross Interchange | 3 |
| AUTO EXTRA | 721S | Indirect Cross Interchange | 3 |
| PEP BOYS | 721PB | Indirect Cross Interchange | 3 |
| FEDERATED | BS721 | Indirect Cross Interchange | 3 |
| FORD | F7CZ2200BA | Indirect Cross Interchange | 3 |
| SEARS | 721RH | Indirect Cross Interchange | 3 |
| SATISFIED BRAKE PRODUCTS | B721 | Indirect Cross Interchange | 3 |
| RAYLOC | TS10721 | Indirect Cross Interchange | 3 |
| RAYLOC | AE10721 | Indirect Cross Interchange | 3 |
| PARTS PLUS | P721B | Indirect Cross Interchange | 3 |
| NAPA | TS721S | Indirect Cross Interchange | 3 |
| NAPA | AE721S | Indirect Cross Interchange | 3 |
| RAYBESTOS | 721B | Indirect Cross Interchange | 3 |
| CENTRIC | 11007210 | Indirect Cross Interchange | 3 |
| CARQUEST | RS721 | Indirect Cross Interchange | 3 |
| CARQUEST | BS721 | Indirect Cross Interchange | 3 |
| AMERICAN REMANUFACTURING | 72721 | Indirect Cross Interchange | 3 |
| RAYBESTOS | 721RP | Indirect Cross Interchange | 3 |
| WAGNER | Z721 | Indirect Cross Interchange | 3 |
| WAGNER | PAB721 | Indirect Cross Interchange | 3 |
| RAYBESTOS | 721SG | Indirect Cross Interchange | 2 |
| FMSI | S721 | Indirect Cross Interchange | 2 |
| ACDelco | 14721B | Indirect Cross Interchange | 2 |
| RAYBESTOS | 721PG | Indirect Cross Interchange | 2 |
| MIDAS | BS1548 | Indirect Cross Interchange | 2 |
| GM | 18038583 | Indirect Cross Interchange | 2 |
| AutoZone | BR94B | Indirect Cross Interchange | 2 |
| DELPHI | DL50 | Indirect Cross Interchange | 2 |
| NAPA | 721S | Indirect Cross Interchange | 1 |
| BENDIX | 698 | Indirect Cross Interchange | 1 |
| GUARANTEED | 71721 | Indirect Cross Interchange | 1 |
| AUTO EXTRA | AXS721 | Indirect Cross Interchange | 1 |
| TRUSTAR | TNB721 | Indirect Cross Interchange | 1 |
| SEALED POWER | PAB721 | Indirect Cross Interchange | 1 |
| FMSI | 7211407 | Indirect Cross Interchange | 1 |
| MOTORCRAFT | BR94 | Indirect Cross Interchange | 1 |
| FDP BRAKES | 721 | Indirect Cross Interchange | 1 |
| FEDERAL MOGUL | S721 | Indirect Cross Interchange | 1 |
| RAYMOLD | 721RP | Indirect Cross Interchange | 1 |
| RAYBESTOS | 721 | Indirect Cross Interchange | 1 |
| NEWTEK | NB721 | Indirect Cross Interchange | 1 |
| BENDIX | R698 | Indirect Cross Interchange | 1 |