| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| Deka | 6121RMF | Direct Cross Interchange | 8 |
| PARTS PLUS | 121R75 | Direct Cross Interchange | 8 |
| PARTS MASTER | UL121R | Direct Cross Interchange | 8 |
| CARQUEST | 121R70 | Direct Cross Interchange | 8 |
| AutoZone | 6121RMF | Direct Cross Interchange | 7 |
| PARTS PLUS | 121R65 | Direct Cross Interchange | 6 |
| PARTS MASTER | 121R60 | Direct Cross Interchange | 6 |
| PRONTO | 121R600 | Direct Cross Interchange | 1 |
| FEDERATED | UL121R | Indirect Cross Interchange | 5 |
| INTERSTATE | MTP121R | Indirect Cross Interchange | 5 |
| NAPA | 75121R | Indirect Cross Interchange | 5 |
| PARTS MASTER | 6121RMF | Indirect Cross Interchange | 3 |
| PARTS MASTER | 121RC | Indirect Cross Interchange | 1 |