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 122-0836 Oil Filter for Onan RV Generators — Buying Guide & Cross-Reference
Complete buying guide for the 122-0836 oil filter used in Cummins Onan QG 5500 and 7000 RV generators. Cross-reference, price comparison, and compatibility explained.
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, by iFJF Direct R12T Marine Fuel Filter Installation Guide: NPT & ZG1/4-19 Fittings, Torque Specs, and Pro Tips
Step-by-step R12T fuel filter installation guide covering NPT vs ZG1/4-19 fittings, proper torque specs, priming procedures, and common mistakes. Complete marine diesel fuel water separator...
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, by iFJF Direct R12T Fuel Filter Showdown: iFJF R12T vs Racor 120AT vs WIX 33583 — Which One Belongs on Your Boat?
Complete comparison of iFJF R12T vs Racor 120AT vs WIX 33583 fuel water separators. Compare price, filtration, fittings, and find which R12T filter is best...
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, by iFJF Direct How to Install a Bluetooth Battery Kill Switch on Your Diesel Truck: Complete Step-by-Step DIY Guide with App Pairing
Step-by-step DIY guide to install a Bluetooth battery kill switch on diesel trucks, RVs, and UTVs. Includes wiring, Bluetooth pairing, app setup, and troubleshooting.
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, by iFJF Direct How To: Ram 6.7L Cummins Change BOTH Fuel Filters
🛒 Parts Used in This Guide 6.7L Cummins Fuel Filter & Water Separator Kit for Ram 2500 $36.00 Shop Now → 68157291AA 68436631AA Fuel Filter...
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, by iFJF Direct 400-524 Throttle Body Spacer Review: 1999-2004 Mustang GT 4.6L & Crown Victoria — Does It Really Work?
Complete guide to the 400-524 throttle body spacer for 1999-2004 Mustang GT 4.6L V8 & 1996-2008 Crown Victoria. Real dyno results, installation walkthrough, video guides,...
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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
★★★★★
Simple
"Small compact easy, Great product"
— GRM✓ 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
CV52001 Crankcase Ventilation Filter
★★★★★
Excellent
"Excellent value for the price This filter is a cost-effective alternative to more expensive OEM options, making regular maintenance more affordable. 🔧 Good fit and compatibility It installs easily an"
— Oscar Vargas✓ Verified
CV52001 Crankcase Ventilation Filter
★★★★★
Excellent
"Excellent product, I love it, it fits my car perfectly, I buy it oft "
— Belen Bartel✓ Verified
R12T Fuel Filter Water Separator
★★★★★
good-buy
"look-good"
— Butch Goldthwait✓ Verified
CV52001 Crankcase Ventilation Filter
★★★★★
Great quality for half the price!
"Product came in quick with Prime and fit perfectly! Looked up how-to on YouTube. Install took less than 30 min. Reset the perform service light with no issue! Will definitely be buying again when it’s"
— Mine✓ Verified