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 Products
2500HD/3500HD · 2001–2024
Cummins 6.7L
Ram 2500/3500 Heavy Duty
Pickup & Chassis Cab · 2007–2024
18 Products
Pickup & Chassis Cab · 2007–2024
Powerstroke
Ford F-250 to F-550 Super Duty
6.0 / 6.4 / 6.7L · 2003–2024
15 Products
6.0 / 6.4 / 6.7L · 2003–2024
Maintenance Guides & Tips
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, by iFJF Direct Ford 6.0 Liter Powerstroke EGR Valve Installation
🛒 Parts Used in This Guide 11025 Diesel Fuel Tank Aux Mount Kit Ford F250 F350 1999-201 $73.99 Shop Now → 12642623 Fuel Filter Head...
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, by iFJF Direct iFJF 1403 Performer 500 CFM 4-Barrel Carburetor Installation Guide
🛒 Parts Used in This Guide 12642623 Fuel Filter Head + 1R-0750 Refit for 2005-2016 Dura $87.99 Shop Now → 1R-0750 Fuel Filter Aluminum Head...
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, by iFJF Direct iFJF diesel filter with R12T filter cartridge
Short answer: yes — a spin-on fuel-water separator such as the iFJF R12T swaps out the messy cartridge housing on most 2001-2016 Duramax 6.6L, 2003-2007...
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, by iFJF Direct Ram 6.7L Cummins Fuel Filter Cap Replacement & Billet Aluminum Upgrade (2010-2020)
Billet aluminum fuel filter cap upgrade for 2010-2020 Ram 6.7L Cummins — DIY service guide, torque specs and O-ring tips. Shop iFJF at ifjf.net.
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, by iFJF Direct 7.3L Powerstroke Fuel Filter Replacement (1999-2003 Ford F-250/F-350)
The short answer: On a 1999–2003 Ford 7.3L Powerstroke (F-250, F-350, F-450, F-550 Super Duty, Excursion, and E-350/E-450/E-550 vans), the fuel filter sits in a...
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, by iFJF Direct 62mm Throttle Body Install for Jeep 4.0L: 56mm to 62mm Upgrade Guide
The Jeep 4.0L inline-six is one of the most durable engines ever bolted into a Wrangler, Cherokee, or Grand Cherokee. But from the factory, it...
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Browse All ProductsWhat Our Customers Say
4.9★ average from 3,200+ verified reviews — Real feedback from real customers
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
R12T Fuel Filter Water Separator
★★★★★
Great Price.
"Was looking on ebay for this. But better price on Amazon. Amazon has everything you are looking for. Love It !"
— lisa✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Good quality product
"Fast shipping,easy to install"
— Elesio c.✓ Verified
L5P Fuel Filter Kit
★★★★★
Saved $100 vs dealership
"Dealership quoted $180 for L5P fuel filter replacement. Bought this kit and did it myself in 30 minutes. For $40 you can't beat it."
— Jack W.✓ Verified
DEF Pump Filter Kit
★★★★★
Fixed DEF warning instantly
"Was getting the 'DEF system service required' warning. Swapped this filter kit and cleared the codes — hasn't come back in 3 weeks."
— Tom P.✓ Verified
Air Filter — Duramax 6.6L
★★★★★
Noticeable improvement
"Put this in my 2019 Silverado 2500HD. Better throttle response and seeing about 1.5 MPG gain on the highway. The old filter was way dirtier than I thought."
— Ron P.✓ Verified