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 R12T Fuel Filter Water Separator Kit - 120 AT NPT ZG1/4-19 with Fittings
🛒 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 Convert Your Intex Skimmer Pool to a Sand Filter System: SFX1000/SFX1500 Kit Install in 30 Minutes
Convert Your Intex Skimmer Pool to a Sand Filter System: SFX1000/SFX1500 Kit Install in 30 Minutes Stock Intex skimmer pumps are fine for a 12-foot...
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, by iFJF Direct Freightliner M2 Air Filter Swap: P607965 AF26424 Replacement — 15 Minutes, No Tools That Aren't Already In Your Truck
Freightliner M2 Air Filter Swap: P607965 AF26424 Replacement — 15 Minutes, No Tools That Aren't Already In Your Truck Keep blowing black smoke? Fuel economy...
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, by iFJF Direct 245R Diesel Fuel Water Separator Replacement: R25T WK940/38X Swap in Under an Hour
245R Diesel Fuel Water Separator Replacement: R25T WK940/38X Swap in Under an Hour I've had a 245R-series Volvo Penta in the shop three times this...
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, by iFJF Direct CB Radio Antenna Spring Mount Guide: Stainless Steel vs Standard — Which Spring Is Right for Your Rig?
Why Your CB Antenna Needs a Spring Mount — The Physics Behind the Protection If you run a CB radio in a semi-truck, off-road rig,...
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, by iFJF Direct Mercruiser 4.3L V6 Marine Carburetor Replacement Guide: 3310-807764A1 Electric Choke Install & Tuning
Signs Your Mercruiser 4.3L Carburetor Is Failing If you run a Mercruiser 4.3L V6 in a Bayliner, Sea Ray, Chaparral, or Glastron from the 1990s...
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Browse All ProductsWhat Our Customers Say
4.9★ average from 3,200+ verified reviews — Real feedback from real customers
EGR Delete Kit — Duramax LBZ
★★★★★
Clean fit, immediate gains
"Installed on my 2007 Silverado Classic. Everything lined up perfectly. Noticeably better throttle response and about 2mpg improvement on the highway."
— Jay W.✓ 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
R12T Fuel Filter Water Separator
★★★★★
Fast delivery.
"Great filter for the price."
— oscar haaland✓ 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
R12T Fuel Filter Water Separator
★★★★★
It works great
"It works great"
— Kevin Alexis✓ Verified