| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| PONTIAC | 16242921 | Direct Cross Interchange | 1 |
| CHEVROLET | 16242921 | Direct Cross Interchange | 1 |
| GM | 16242921 | Direct Cross Interchange | 1 |
| STANDARD MOTOR | EM2921U | Indirect Cross Interchange | 1 |
| STANDARD MOTOR PRODUCTS | EM2921U | Indirect Cross Interchange | 1 |
| STANDARD MOTOR PRODUCTS | EM2921 | Indirect Cross Interchange | 1 |