Factory-Direct Diesel Filtration for American Trucks, Boats & RVs
Save 30-50% vs Dealership — IATF 16949 Certified Manufacturer
- 🏭 20+ Years Manufacturing
- 📋 IATF 16949 Certified
- ⭐ 4.9★ on Amazon (3,200+ Reviews)
- 💰 Factory-Direct Pricing
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Why Choose iFJF Direct?
More than a store — we're the manufacturer.
Factory Direct
No middleman markup. We design, manufacture, and ship from our own facility. Since 2009.
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IATF 16949 & ISO 9001
Automotive-grade quality certified. Same standards trusted by global OEM manufacturers.
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4.9★ on Amazon
3,200+ verified reviews from diesel & RV owners who trust our quality and value.
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Pool Parts
Factory-direct pool replacement parts for Intex, Hayward, Pentair, Polaris & more. Bulk orders welcome.
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Maintenance Guides & Tips
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, by iFJF Direct HOW TO Avoid Issues Replace Duramax 3.0 Fuel Filter
How to Replace the Fuel Filter on Your Duramax 3.0 (L5P LM2/LZ0) — Complete Guide How to Replace the Fuel Filter on Your Duramax 3.0...
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, by iFJF Direct Chevy GMC 6.5L Diesel Fuel Filter Replacement Guide — Suburban Silverado Sierra Tahoe DIY
Video: How to replace the diesel fuel filter and bleed the air on a GM 6.5L V8 diesel engine — demonstrated on a 1999 Chevy...
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, by iFJF Direct How to install iFJF R12T Fuel Filter/Water Separator 120AT NPT ZG1/4-1
How to Install iFJF R12T Fuel Filter/Water Separator: Complete Step-by-Step Guide Protect your diesel engine from water contamination and extend its lifespan with the iFJF...
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, by iFJF Direct ISINFLASH Smart Battery Kill Switch How To Installation
How to Install a Smart Battery Kill Switch: Complete Step-by-Step Guide (2026) How to Install a Smart Battery Kill Switch: Complete Step-by-Step Guide By iFJF...
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, by iFJF Direct Ford 6.7 Powerstroke Diesel 2011-2016 Fuel Filters Replacement How-To
How to Replace Fuel Filters on a Ford 6.7L Powerstroke Diesel (2011–2016) If you own a 2011–2016 Ford F-250 or F-350 with the 6.7L Powerstroke...
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, by iFJF Direct 2001-2016 Duramax Diesel Fuel Filter Replacement: Complete DIY Guide (With NAPA 3960)
Step-by-step Duramax fuel filter replacement guide for 2001-2016 6.6L engines. Covers inner fender removal, water sensor disconnect, O-ring lubrication, and priming procedure. NAPA 3960 compatible.
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Browse All ProductsWhat Our Customers Say
4.9★ average from 3,200+ verified reviews — Real feedback from real customers
Powerstroke Oil Filter
★★★★★
OEM quality without OEM price
"Been using these on my 2015 F350 6.7L for 3 oil changes now. Cut open the first one after 5K miles — filter media was intact and clean. No bypass valve issues."
— Dave H.✓ Verified
R12T Fuel Filter Water Separator
★★★★★
It works great
"It works great"
— Kevin Alexis✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Worth the money
"Quality product, worth the money"
— Scout7✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Good quality product
"Fast shipping,easy to install"
— Elesio c.✓ Verified
Fuel Filter — Cat / Cummins
★★★★★
Fleet-tested, fleet-approved
"We run 12 trucks with Cummins ISX engines. Switched to iFJF filters 6 months ago. Zero fuel system issues since. The cost savings over Fleetguard are substantial."
— Truck Shop Dave✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Best upgrade for my boat
"Excellent product, installed easily and does not leak. I can tell a huge difference in the way my outboard runs. The problems, missing and sputtering I thought were coming from water in the gas are completely gone. I would recommend this addition to anyone with a boat, no matter what size outboard."
— GG 1✓ Verified