Description
Listed is a NOS Genuine NAPA 3959 Fuel Filter.
Please check fitment before purchasing.
- Cummins ISB 6.7L, ISC, ISL Engines, CAT C7 (suction side) – has drain + plug-in sensor port – used w/ 3966 (pressure side)
- Sensor Port Thread Size Is 14×2 mm
- 2 Micron






![New [2PACK] Genuine NAPA 3052 Fuel Filter](https://www.nosmarketplace.com/wp-content/uploads/2026/01/3585_9094e8b3-1b58-4d8a-aaed-4b1d408585810-300x300.jpeg)

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