Factory-Direct Diesel Filtration for American Trucks, Boats & RVs
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- ⭐ 4.9★ on Amazon (3,200+ Reviews)
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Factory Direct
No middleman markup. We design, manufacture, and ship from our own facility. Since 2009.
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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 Direct Complete Onan Quiet Diesel RV Generator Tune-Up: The 3-Filter Maintenance Kit Guide (Fuel + Oil + Air)
Complete tune-up guide for Cummins Onan Quiet Diesel RV generators. Covers the 3-filter maintenance kit: 149-2513 fuel filter, 122-0833 oil filter, 140-2897 air filter. Service...
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, by iFJF Direct How to Replace the Fuel Filter on Your Onan Quiet Diesel RV Generator (HDKAH / HDKAK / HDKAJ)
Step-by-step guide to replacing the fuel filter on Cummins Onan Quiet Diesel RV generators (HDKAH, HDKAK, HDKAJ). Covers tools, procedure, compatibility, cross-reference part numbers, and...
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, by iFJF Direct RV Generator Fuel Filter Replacement: Two Expert Methods Compared (Quiet Diesel vs QG 4000)
Two expert YouTube methods for replacing your Onan RV generator fuel filter — RVgeeks (191K views, Quiet Diesel inline canister) vs RV Habit (107K views,...
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, by iFJF Direct Cummins Onan Quiet Diesel RV Generator Filter Change: Complete DIY Maintenance Guide (149-2513, 122-0833, 140-2897)
Complete DIY guide to servicing your Cummins Onan Quiet Diesel RV generator — fuel filter (149-2513), oil filter (122-0833), and air filter (140-2897) replacement. Cross-reference...
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, by iFJF Direct Preventative Upgrades: Replacing CP4 with CP3 Pump & Fass Fuel System
Why Upgrade Your Duramax CP4 to CP3? The Preventative Fix That Saves Thousands If you own a 2011-2016 Duramax LML, you've probably heard the horror...
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, by iFJF Direct OBS F-Series: How To Install Brake Pads & Rotor for 1987-91 F250/F350
How to Replace Brake Pads & Rotors on 1987–1991 Ford F250/F350 Dually — Complete DIY Guide If you own a 1987, 1988, 1989, 1990, or...
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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
★★★★★
"Kubota bx owners GO FOR IT!!"
— pamela cookinham✓ 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
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
★★★★★
Perfect
"Works great"
— Elmer McGill✓ 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
Fuel Water Separator
★★★★★
Great upgrade from stock
"Upgraded from my old Racor unit and the difference is night and day. Aluminum housing feels solid, no more rust concerns. The transparent bowl is a game changer."
— Steven R.✓ Verified