| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| BENDIX | MRD421 | Direct Cross Interchange | 1 |
| ACDelco | 17D421M | Indirect Cross Interchange | 1 |
| ACDelco | 17D421C | Indirect Cross Interchange | 1 |
| AUTO EXTRA | AXMD421 | Indirect Cross Interchange | 1 |
| Friction Master | MX421AIM | Indirect Cross Interchange | 1 |
| Friction Master | MX421 | Indirect Cross Interchange | 1 |
| AMS | DMX421L | Indirect Cross Interchange | 1 |
| AutoZone | SGD421M | Indirect Cross Interchange | 1 |
| AutoZone | PGD421M | Indirect Cross Interchange | 1 |
| AutoZone | MKD421 | Indirect Cross Interchange | 1 |
| UNIVERSAL (BRAKE) | MXD421H | Indirect Cross Interchange | 1 |
| UNIVERSAL (BRAKE) | MXD421 | Indirect Cross Interchange | 1 |
| UNIVERSAL (BRAKE) | MDS421H | Indirect Cross Interchange | 1 |
| UNIVERSAL (BRAKE) | MDS421 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PRO421SD | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PRO421HSD | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PRO421H | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PRO421 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PR421H | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | PR421 | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | MPD421H | Indirect Cross Interchange | 1 |
| SATISFIED BRAKE PRODUCTS | MPD421 | Indirect Cross Interchange | 1 |
| NAPA | SS7308CM | Indirect Cross Interchange | 1 |
| MIGHTY | TS421 | Indirect Cross Interchange | 1 |
| FMSI | 7308AD421 | Indirect Cross Interchange | 1 |
| CENTRIC | 30004210 | Indirect Cross Interchange | 1 |
| CENTRIC | 10404210 | Indirect Cross Interchange | 1 |
| BENDIX | MKD421 | Indirect Cross Interchange | 1 |
| CENTRIC | 1020421 | Indirect Cross Interchange | 1 |
| RAYBESTOS | SGD421M | Indirect Cross Interchange | 1 |
| CARQUEST | GMD421F | Indirect Cross Interchange | 1 |
| RAYBESTOS | SGD421AM | Indirect Cross Interchange | 1 |
| RAYBESTOS | PGD421M | Indirect Cross Interchange | 1 |
| CARQUEST | BMD421A | Indirect Cross Interchange | 1 |
| WAGNER | ZX421A | Indirect Cross Interchange | 1 |
| CARQUEST | BMD421 | Indirect Cross Interchange | 1 |
| WAGNER | ZX421 | Indirect Cross Interchange | 1 |
| CARQUEST | BD421 | Indirect Cross Interchange | 1 |
| WAGNER | ZD421 | Indirect Cross Interchange | 1 |