Description
FF42000 Fuel Filter — Compact 3″ Spin-On for Diesel Engines
The FF42000 spin-on fuel filter is a user-friendly, easy-install alternative to the larger FF5018, FF5033, and FF5052 series. With a compact 3″ diameter and standard spin-on thread pattern, it fits tight engine compartments where full-size filters won't clear. Replaces FF42001, FF5494, 3903640, and 3931065.
Key Features
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Compact 3″ Diameter: Fits tight engine bays where full-size spin-on filters physically won't clear — ideal for repowered and retrofit installations.
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User-Friendly Design: Smaller form factor means easier hand access during filter changes — no special wrenches required in most applications.
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Full Filtration Performance: Despite compact size, maintains 10-micron efficiency with media optimized for high dirt-holding capacity.
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Versatile Cross-Reference: Replaces FF42001, FF5494, FF5018, FF5033, FF5052, 3903640, and 3931065 — one filter covers multiple applications.
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IATF 16949 Certified: Consistent quality batch after batch with full traceability.
Technical Specifications
| Specification |
Value |
| Part Number |
FF42000 |
| Diameter |
3″ (76mm) |
| Filtration |
10 Micron Nominal |
| Replaces |
FF42001, FF5494, FF5018, FF5033, FF5052 |
| OEM Cross Ref |
3903640, 3931065 |
Vehicle & Engine Compatibility
| Replaces |
Also Replaces |
Notes |
| FF42001 |
FF5494 |
Identical spec — different branding |
| FF5018 |
FF5033 |
Larger diameter alternative — check clearance |
| FF5052 |
3903640/3931065 |
Donaldson/Cummins equivalents |
Why Choose This Product?
Not every diesel engine bay has room for a full-size spin-on filter. The FF42000's 3″ diameter makes it the go-to choice for repowered equipment, custom installations, and applications where frame rail or accessory clearance is tight. Same filtration quality, smarter package.
Frequently Asked Questions
Q: Is the FF42000 the same filtration quality as the larger FF5018?
A: Yes. Despite the smaller canister, the FF42000 uses the same 10-micron filtration media. Replace at the same interval as the FF5018.
Q: Will this fit where my FF5033 currently goes?
A: The FF42000 has a 3″ diameter vs the larger FF5033. It will fit the same filter head thread, but verify adequate gasket sealing surface on your filter base.
Q: What vehicles use the FF42000?
A: The FF42000 is a universal replacement used across multiple diesel platforms including Cummins B-Series, ISB, QSB, and various industrial/agricultural diesel engines.
Order your iFJF replacement part today and experience the quality difference. Fast shipping from our US warehouse.
