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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Shop by Engine
Find the right diesel filter for your truck — Duramax, Cummins, or Powerstroke
Duramax 6.6L
Chevrolet Silverado & GMC Sierra
2500HD/3500HD · 2001–2024
23 Products2500HD/3500HD · 2001–2024
Cummins 6.7L
Ram 2500/3500/4500/5500
2007.5+ · RV Generators
38 Products2007.5+ · RV Generators
Powerstroke
Ford F-250 to F-550 Super Duty
7.3L / 6.0L / 6.4L / 6.7L · 1995–2022
7 Products7.3L / 6.0L / 6.4L / 6.7L · 1995–2022
Maintenance Guides & Tips
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, by iFJF Team How to Install a Tachometer Gauge on Any Diesel Truck: 4-Wire Wiring Guide
If you drive an older diesel truck — especially one from the 1990s or early 2000s — you may have noticed something missing on your...
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, by iFJF Team Marine Fuel Water Separator Guide: Why Your Outboard Needs One and How to Choose
Why Water in Fuel Is the #1 Outboard Killer Every seasoned boater has a story — or knows someone who does. The engine sputters 3...
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, by iFJF Team Ford F150 F250 Bronco EGR Delete: Complete Guide (1986-1995) — Cost, Benefits & Installation
What is EGR and Why Delete It on Pre-96 Fords? If you own an OBS (Old Body Style) Ford truck — an F-150, F-250, F-350,...
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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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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