7 hose parts that fit the Cummins 4B, with brands, part numbers and cross-references.
Numbers in blue open their full cross-reference page — every interchange number for that part.
| Brand | Part number | Description |
|---|---|---|
| Cummins | 3903248 | oil filler tube |
| Cummins | 3905440 | oil filler tube |
| Cummins | 3915075 | plain hose |
| Cummins | 3904205 | fuel supply tube |
| Cummins | 3999796 | Air Transfer Pipe For Cummins 4B B3.9 6B 5.9L ISB 6.7L 3999796 |
| Cummins | 5265278 | New water bypass tube For Cummins 4B B3.9 ISB 6B 6.7L 4.5L B5… |
| Cummins | 5265285 | Male Adapter Elbow For Cummins 4B B3.9 6B B5.9 6.7L 5265285 |
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Fitment is a guide — always confirm the exact part against your vehicle's spec and VIN.