| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| WAGNER | SX421 | Direct Cross Interchange | 1 |
| WAGNER | MX421A | Direct Cross Interchange | 1 |
| WAGNER | MX421 | Direct Cross Interchange | 1 |
| ACDelco | 17D421M | Indirect Cross Interchange | 3 |
| BENDIX | MKD421 | Indirect Cross Interchange | 3 |
| AutoZone | SGD421M | Indirect Cross Interchange | 2 |
| AutoZone | PGD421M | Indirect Cross Interchange | 2 |
| AutoZone | MKD421 | Indirect Cross Interchange | 2 |
| NAPA | UP7308M | Indirect Cross Interchange | 2 |
| CARQUEST | GMD421F | Indirect Cross Interchange | 2 |
| RAYBESTOS | SGD421M | Indirect Cross Interchange | 2 |
| RAYBESTOS | RRD421M | Indirect Cross Interchange | 2 |
| RAYBESTOS | PGD421QS | Indirect Cross Interchange | 2 |
| RAYBESTOS | PGD421M | Indirect Cross Interchange | 2 |
| RAYBESTOS | BD421M | Indirect Cross Interchange | 2 |
| ACDelco | 17D421MHP | Indirect Cross Interchange | 2 |
| RAYBESTOS | SSRD421 | Indirect Cross Interchange | 2 |
| FORD | F2SZ2001A | Indirect Cross Interchange | 2 |
| FORD | F2DZ2001A | Indirect Cross Interchange | 2 |
| FORD | F20Y2001A | Indirect Cross Interchange | 2 |
| FORD | F10Y2001A | Indirect Cross Interchange | 2 |
| FORD | E9DZ2001B | Indirect Cross Interchange | 2 |
| ACDelco | 17D421C | Indirect Cross Interchange | 2 |
| ACDelco | 17D421AMHP | Indirect Cross Interchange | 2 |
| WD EXPRESS | 52003240413 | Indirect Cross Interchange | 1 |
| IMC | 52003240503 | Indirect Cross Interchange | 1 |
| CARQUEST | GMD421 | Indirect Cross Interchange | 1 |
| CENTRIC | 30003240 | Indirect Cross Interchange | 1 |
| CARQUEST | BMD421A | Indirect Cross Interchange | 1 |
| WD EXPRESS | 52003240412 | Indirect Cross Interchange | 1 |
| CENTRIC | 10404210 | Indirect Cross Interchange | 1 |
| CARQUEST | BMD421 | Indirect Cross Interchange | 1 |
| INTERAMERICAN MOTOR | D9324SM | Indirect Cross Interchange | 1 |
| CENTRIC | 1040421 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2632404 | Indirect Cross Interchange | 1 |
| INTERAMERICAN MOTOR | D9324SHD | Indirect Cross Interchange | 1 |
| CENTRIC | 10403240 | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2442104 | Indirect Cross Interchange | 1 |
| INTERAMERICAN MOTOR | D9324SC | Indirect Cross Interchange | 1 |
| FORD | E9DZ2001A | Indirect Cross Interchange | 1 |
| AUTOSPECIALTY | 2432404 | Indirect Cross Interchange | 1 |
| INTERAMERICAN MOTOR | D9324RM | Indirect Cross Interchange | 1 |
| FORD | E8DZ2001A | Indirect Cross Interchange | 1 |
| BENDIX | MKD421FM | Indirect Cross Interchange | 1 |
| INTERAMERICAN MOTOR | D9324R | Indirect Cross Interchange | 1 |
| FORD | E7DZ2001A | Indirect Cross Interchange | 1 |
| BENDIX | MKD324FM | Indirect Cross Interchange | 1 |
| DASH 4 | MD421 | Indirect Cross Interchange | 1 |
| FORD | E6DZ2001C | Indirect Cross Interchange | 1 |
| AUTO EXTRA | AXMD421 | Indirect Cross Interchange | 1 |
| FORD | E6DZ2001B | Indirect Cross Interchange | 1 |
| AMS | TXD421L | Indirect Cross Interchange | 1 |
| BENDIX | MKD324 | Indirect Cross Interchange | 1 |
| FORD | E6DZ2001A | Indirect Cross Interchange | 1 |
| AMS | SPQ421S | Indirect Cross Interchange | 1 |
| BENDIX | D571 | Indirect Cross Interchange | 1 |
| PARTS PLUS | 200434211 | Indirect Cross Interchange | 1 |
| AMS | SPQ421L | Indirect Cross Interchange | 1 |
| BENDIX | D563 | Indirect Cross Interchange | 1 |
| MOTORCRAFT | BR14B | Indirect Cross Interchange | 1 |
| BENDIX | D324CT | Indirect Cross Interchange | 1 |
| MOTORCRAFT | BR14 | Indirect Cross Interchange | 1 |
| MONROE | DX421A | Indirect Cross Interchange | 1 |
| MONROE | DX421 | Indirect Cross Interchange | 1 |
| R1 Concepts | S0404210 | Indirect Cross Interchange | 1 |
| MONROE | CX421 | Indirect Cross Interchange | 1 |
| R1 Concepts | A0404210 | Indirect Cross Interchange | 1 |
| EIS | QMX421 | Indirect Cross Interchange | 1 |
| EIS | MX421 | Indirect Cross Interchange | 1 |
| EIS | DM421 | Indirect Cross Interchange | 1 |
| DURA | BP421MS | Indirect Cross Interchange | 1 |
| RAYBESTOS | PGD421AQS | Indirect Cross Interchange | 1 |
| RAYBESTOS | PGD421AM | Indirect Cross Interchange | 1 |
| RAYBESTOS | PGD324M | Indirect Cross Interchange | 1 |
| RAYBESTOS | SSRD324 | Indirect Cross Interchange | 1 |
| FORD | F0DZ2001A | Indirect Cross Interchange | 1 |
| NAPA | SS7308CM | Indirect Cross Interchange | 1 |
| AutoZone | BR14B | Indirect Cross Interchange | 1 |
| NAPA | SS7222AM | Indirect Cross Interchange | 1 |
| AUTOPART INTERNATIONAL | 86606 | Indirect Cross Interchange | 1 |
| MIDAS | BP1445M | Indirect Cross Interchange | 1 |
| NAPA | SD7222AM | Indirect Cross Interchange | 1 |
| MIDAS | BP1342M | Indirect Cross Interchange | 1 |
| NAPA | AE7308CM | Indirect Cross Interchange | 1 |
| FORD | F3DZ2001C | Indirect Cross Interchange | 1 |
| NAPA | AE7222AM | Indirect Cross Interchange | 1 |
| FORD | F3DZ2001B | Indirect Cross Interchange | 1 |
| WD EXPRESS | 52003240505 | Indirect Cross Interchange | 1 |
| MIGHTY | XL324M | Indirect Cross Interchange | 1 |
| FORD | F3DZ2001A | Indirect Cross Interchange | 1 |
| WD EXPRESS | 52003240504 | Indirect Cross Interchange | 1 |
| IMC | 52003240505 | Indirect Cross Interchange | 1 |
| WD EXPRESS | 52003240503 | Indirect Cross Interchange | 1 |
| IMC | 52003240504 | Indirect Cross Interchange | 1 |
| CARQUEST | GMD421A | Indirect Cross Interchange | 1 |