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
Shop by Category
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.
Learn About iFJF →
IATF 16949 & ISO 9001
Automotive-grade quality certified. Same standards trusted by global OEM manufacturers.
View Certifications →
4.9★ on Amazon
3,200+ verified reviews from diesel & RV owners who trust our quality and value.
Read Amazon Reviews →Trending Now
What shoppers are viewing right now — updated daily from live traffic data
$29.99
$74.58
$89.99
$189.99
$39.99
$49.99
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
-
, by iFJF Direct Best Water Separator Fuel Filter for Diesel & Marine Engines — Complete 2026 Buying Guide
A quality fuel water separator is the cheapest insurance for your diesel engine. We compared the top 5 water separator fuel filters for 2026 and...
-
, by iFJF Direct 2006-2007 LBZ Duramax Cold Air Intake Install Guide
Upgrading the cold air intake on your 2006–2007 Chevrolet or GMC Duramax 6.6L (LLY/LBZ) is one of the most rewarding bolt-on jobs you can do...
-
, by iFJF Direct SPELAB 4" Straight Pipe Kit Install 05 Dodge 3500 Cummins
How to Install a 4-Inch Straight Pipe Kit on Your 2005 Dodge 3500 Cummins – Full DIY Guide If you own a 2005 Dodge 3500...
-
, by iFJF Direct Installing the EDGE CTS3 TUNER on My 2019 GMC Sierra Denali HD (L5P Du
How to Install the Edge CTS3 Evolution Tuner on a 2019 GMC Sierra Denali HD (L5P Duramax) L5P Duramax Edge CTS3 GMC Sierra Denali HD...
-
, by iFJF Direct How To Perform A Cooling System Flush On Your Diesel Engine. Diesel E
Why Diesel Engine Coolant Flushes Matter More Than You Think If you own a diesel truck, RV, or any diesel-powered equipment, the cooling system is...
-
, by iFJF Direct How to install Tie Rods on your GM Truck | Dmax XD Tie Rod Upgrade
Duramax Tie Rod Install: XD Heavy-Duty Upgrade Guide If your GM 2500/3500 wanders on the highway, your steering feels vague, or you've bent a stock...
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
Browse All ProductsWhat Our Customers Say
4.9★ average from 3,200+ verified reviews — Real feedback from real customers
R12T Fuel Filter Water Separator
★★★★★
Worth the money
"Quality product, worth the money"
— Scout7✓ Verified
R12T Fuel Filter Water Separator
★★★★★
Replaced the original to this.
"The original on my cub cadet was a piece of trash, this new one is great! And easy to install."
— Debora✓ Verified
R12T Fuel Filter Water Separator
★★★★★
It works great
"It works great"
— Kevin Alexis✓ Verified
Duramax Fuel Filter
★★★★★
Perfect fit, great value
"Swapped both filters on my 2018 L5P in under 20 minutes. These match OEM spec exactly and cost a fraction of what the dealer charges. Stocked up on a 6-pack for future changes."
— Mike D.✓ 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
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