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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

Why Choose iFJF Direct?

More than a store — we're the manufacturer.

iFJF Factory — Manufacturing Facility

Factory Direct

No middleman markup. We design, manufacture, and ship from our own facility. Since 2009.

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IATF 16949 & ISO 9001 Quality Certified

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

4.9★ on Amazon

3,200+ verified reviews from diesel & RV owners who trust our quality and value.

Read Amazon Reviews

Shop by Engine

Find the right diesel filter for your truck — Duramax, Cummins, or Powerstroke

Duramax 6.6L Diesel Engine

Duramax 6.6L

Chevrolet Silverado & GMC Sierra
2500HD/3500HD · 2001–2024
23 Products
Cummins 6.7L Diesel Engine

Cummins 6.7L

Ram 2500/3500 Heavy Duty
Pickup & Chassis Cab · 2007–2024
18 Products
Powerstroke Diesel Engine

Powerstroke

Ford F-250 to F-550 Super Duty
6.0 / 6.4 / 6.7L · 2003–2024
15 Products

Maintenance Guides & Tips

View All Guides → 

  • , by iFJF Direct iFJF Bluetooth Kill Switch vs ISINFLASH vs Traditional Mechanical: Which Anti-Theft Solution Actually Stops Thieves in 2026?

    iFJF Bluetooth Kill Switch vs ISINFLASH vs Traditional Mechanical: Which Anti-Theft Solution Actually Stops Thieves in 2026? Vehicle theft in the United States hit 1,020,729...

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  • , by iFJF Direct FASS vs AirDog Lift Pumps: Which Duramax Fuel System Upgrade Actually Saves Your CP4 in 2026?

    FASS vs AirDog Lift Pumps: Which Duramax Fuel System Upgrade Actually Saves Your CP4 in 2026? If you own a 2001–2016 Chevy or GMC Duramax...

    Read more 

  • Bluetooth Battery Kill Switch: iFJF 250A vs Traditional Mechanical vs ISINFLASH — Which Anti-Theft Solution Actually Works?

    , by iFJF Direct Bluetooth Battery Kill Switch: iFJF 250A vs Traditional Mechanical vs ISINFLASH — Which Anti-Theft Solution Actually Works?

    Bluetooth Battery Kill Switch: iFJF 250A vs Traditional Mechanical vs ISINFLASH — Which Anti-Theft Solution Actually Stops a Thief? Car theft in North America hit...

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  • FASS vs AirDog: Which Diesel Lift Pump Actually Makes Sense for Your Duramax?

    , by iFJF Direct FASS vs AirDog: Which Diesel Lift Pump Actually Makes Sense for Your Duramax?

    FASS vs AirDog: The Diesel Lift Pump Decision That Actually Matters Here's the deal. Your Duramax came from the factory with a CP4 high-pressure fuel...

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  • , by iFJF Direct iFJF EGR Simulator Eliminator vs Block-Off Plate: Which One Does Your Ford Actually Need?

    EGR Simulator Eliminator vs. Block-Off Plate: Stop Guessing — Here's What Your Ford Actually Needs If you own a 1986–1995 Ford F-150, F-250, or Bronco...

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  • , by iFJF Direct iFJF Billet Aluminum vs OEM Plastic Fuel Filter Cap: L5P Duramax Comparison & Why It Matters

    Why Your L5P's Plastic Fuel Filter Cap Is a Ticking Time Bomb If you own a 2017–2026 Chevy Silverado HD or GMC Sierra HD with...

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View All Guides → 

Exclusive for Returning Customers

Already Bought From Us?

Welcome back! Reorder your filters, try a new category, or reach out for bulk pricing. Use code LOYAL15 for 10% OFF your next order.

One-time use per customer · For customers with previous orders only

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What Our Customers Say

4.9★ average from 3,200+ verified reviews — Real feedback from real customers

R12T Fuel Filter Water Separator
★★★★★
Simple
"Small compact easy, Great product"
— GRM✓ Verified
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
7.3L Powerstroke Coolant Kit
★★★★★
Must-have for 7.3L trucks
"Wish I'd bought this years ago. My 2002 F350 has 220k miles. Installed in 45 minutes and the first filter caught a ton of crud. Cheap insurance."
— Scott E.✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Just right
"Just right"
— Debbie✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Perfect
"Works great"
— Elmer McGill✓ Verified
RV Water Heater Thermostat
★★★★★
Fixed our camper's hot water
"Our Atwood water heater kept tripping the ECO. Swapped this thermostat assembly in 15 minutes with basic tools. Water heats perfectly now. Saved $200 vs a mobile RV tech."
— Karen S.✓ Verified

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