| Competitor Part Number | Competitor Name | Interchange Type | Notes |
|---|---|---|---|
| CUM555421 | CUMMINS | Direct Replacement | |
| 555421 | CUMMINS | Direct Replacement | |
| 555421RX | CUMMINS | Direct Replacement | |
| 555421PX | CUMMINS | Direct Replacement | |
| 555421NX | CUMMINS | Direct Replacement | |
| 555421-1 | CUMMINS | Direct Replacement | |
| AFA-A555421 | AFA PRODUCTS | Direct Replacement |