Description
FD-4647 Fuel Filter Kit for 2017-2025 Ford 6.7L Powerstroke Super Duty — 4 Micron, Anti-Gel Bypass Valve
The iFJF FD-4647 fuel filter kit is a two-element diesel fuel service set for the 2017-2025 Ford F-250, F-350, F-450 and F-550 Super Duty trucks powered by the 6.7L Powerstroke V8. It replaces Motorcraft FD-4647 / FD-4624 / FD-4625-AA / FD-4641 and Ford OE PC3Z-9N184-C / HC3Z-9N184-B / LC3Z-9N184-A, filters particles down to 4 Micron, separates 98% of free water, and is rated for a 15,000-mile service interval. Every box contains the engine-mounted upper filter, the frame-mounted lower water separator, one pre-formed O-ring and one spare retaining clip.
📋 Key Takeaways
- ✅ 4 Micron Filtration: Multi-layer media captures particles down to 4 Micron before they reach the CP4.2 high-pressure fuel pump, protecting plungers and injectors from scoring.
- ✅ 98% Water Separation: The frame-mounted lower separator strips 98% of free water from diesel fuel, the leading cause of injector corrosion and hard cold starts.
- ✅ Anti-Gel Bypass Valve: An integrated bypass valve in the upper filter opens automatically when diesel gels on sub-freezing mornings, keeping fuel flowing instead of stalling the engine.
- ✅ 33% Glass-Fiber Reinforced Nylon 66 Housing: The upgraded injection-molded housing resists heat, vibration and cracking that brittle OEM-style housings develop over time.
- ✅ Complete Service Kit: Upper filter, lower water separator, O-ring and a spare retaining clip (HC3Z-9A317-A) are included, so the job finishes in one pass without a second trip for parts.
Features & Benefits
| Feature |
Benefit (What It Means for You) |
| 4 Micron multi-layer media |
Stops the abrasive particles that score CP4.2 pump plungers — the failure mode that turns a $90 filter job into a $10,000 fuel system repair. |
| 98% free-water separation |
Water is dropped into the drain bowl instead of travelling to the injectors, preventing corrosion, rough idle and hard winter starts. |
| Built-in anti-gel bypass valve |
Gelled fuel bypasses the element instead of starving the engine, so a -10°F morning does not leave you stranded on the shoulder. |
| 33% glass-fiber reinforced Nylon 66 upper housing |
Holds its shape under boost-level heat and heavy-tow vibration — no hairline cracks, no fuel seepage onto a hot engine. |
| Two-element kit with O-ring and spare clip |
Both service points are covered in one purchase; the extra clip saves the job when the original brittle clip snaps during removal. |
| 15,000-mile service interval |
Matches Ford's severe-duty schedule (every third oil change), so one kit covers a full maintenance cycle. |
Compatibility & Cross-Reference
Replaces OEM Part Numbers:
| Interchange Part Number |
Brand |
| FD-4647 (iFJF) |
iFJF |
| FD-4647 |
Motorcraft |
| FD-4624 |
Motorcraft |
| FD-4625-AA |
Motorcraft |
| FD-4641 |
Motorcraft |
| PC3Z-9N184-C |
Ford |
| HC3Z-9N184-B |
Ford |
| HC3Z-9N184-C |
Ford |
| HC3Z-9N184-J |
Ford |
| LC3Z-9N184-A |
Ford |
Vehicle Fitment:
| Model |
Years |
Engine |
| Ford F-250 Super Duty |
2017-2025 |
6.7L Powerstroke V8 Diesel |
| Ford F-350 Super Duty |
2017-2025 |
6.7L Powerstroke V8 Diesel |
| Ford F-450 Super Duty |
2017-2025 |
6.7L Powerstroke V8 Diesel |
| Ford F-550 Super Duty |
2017-2025 |
6.7L Powerstroke V8 Diesel |
Specifications
| Part Number |
FD-4647 |
| Filtration Rating |
4 Micron |
| Water Separation Efficiency |
98% |
| Housing Material |
33% Glass Fiber Reinforced Nylon 66 |
| Service Interval |
15,000 miles |
| Configuration |
Engine-mounted upper filter + frame-mounted lower water separator |
| Includes |
Upper filter, lower water separator, pre-formed O-ring, spare retaining clip |
| Fitment |
2017-2025 Ford F-250 / F-350 / F-450 / F-550 Super Duty, 6.7L Powerstroke |
Why Choose iFJF Over the OEM Dealership?
🛡️ 6-Month Warranty Included · 30-Day Easy Returns · Lifetime Support
Not satisfied? Return it. Fails prematurely? We'll replace it — no receipt-hoarding, no dealership runaround.
As a professional filter manufacturer with a CNAS certified laboratory, we design and build our products to strictly match—and often exceed—OEM specifications. Every single unit undergoes rigorous quality verification:
- 🔬 Lab-Tested Performance: Validated in our certified laboratory for filtration efficiency, particle holding capacity and burst strength.
- 🔍 100% Leakage Control: Factory-tested under pressure to confirm the O-ring and housing seal hold with zero seepage.
- 🛡️ Premium Build Quality: 33% glass-fiber reinforced Nylon 66 housing, multi-layer media and a stainless-steel tension spring.
- 💰 Factory-Direct Supply: Commercial-grade filtration directly from the manufacturer, without dealership markup.
Looking for the standard two-element kit for the same trucks? Compare the FD-4625 fuel filter kit here →
📂 Browse More: All Fuel Filter Products →
6.7L Powerstroke Compatible Parts →
Frequently Asked Questions
Q: What Ford trucks does the FD-4647 fuel filter kit fit?
A: The iFJF FD-4647 fuel filter kit fits the 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 and 2025 Ford F-250, F-350, F-450 and F-550 Super Duty trucks equipped with the 6.7L Powerstroke V8 diesel engine. The kit replaces Motorcraft FD-4647, FD-4624, FD-4625-AA and FD-4641, plus Ford OE PC3Z-9N184-C, HC3Z-9N184-B, HC3Z-9N184-C, HC3Z-9N184-J and LC3Z-9N184-A.
Q: How often should the FD-4647 fuel filter be replaced?
A: Replace the FD-4647 upper filter and lower water separator every 15,000 miles, which matches Ford's severe-duty schedule of every third oil change on the 6.7L Powerstroke. Trucks that tow heavy trailers, idle for long periods, or run in dusty or high-humidity conditions should shorten that interval to 10,000 miles and drain the water separator monthly.
Q: What is the difference between the FD-4647 and the FD-4625?
A: The FD-4647 and the FD-4625 both service the 2017-2025 Ford 6.7L Powerstroke, but the FD-4647 is the later upgraded design: it adds an anti-gel bypass valve inside the upper filter and uses a 33% glass-fiber reinforced Nylon 66 housing that resists the cracking and fuel leaks reported on earlier housings. The FD-4647 also cross-references the newer PC3Z-9N184-C and LC3Z-9N184-A part numbers.
Q: What is included in the FD-4647 kit?
A: Each FD-4647 kit contains one engine-mounted upper fuel filter, one frame-mounted lower fuel/water separator, one pre-formed sealing O-ring and one spare retaining clip equivalent to HC3Z-9A317-A. Both filters and the seal are required for a complete service, so the kit covers the full job in a single purchase.
Q: Why does the FD-4647 have a bypass valve in the upper filter?
A: The bypass valve opens when diesel fuel gels in freezing weather and the element becomes restrictive. Instead of starving the CP4.2 high-pressure pump and stalling the engine, fuel routes around the element so the truck keeps running until the fuel warms up. This is a cold-climate protection feature that a standard filter element does not have.
Q: What part numbers does the FD-4647 replace?
A: The iFJF FD-4647 replaces Motorcraft FD-4647, FD-4624, FD-4625-AA and FD-4641, and Ford OE numbers PC3Z-9N184-C, HC3Z-9N184-B, HC3Z-9N184-C, HC3Z-9N184-J and LC3Z-9N184-A. Cross-reference the number stamped on your existing filter housing before ordering if your truck has had a filter base conversion.
Q: How do I install the frame-mounted lower filter on a 6.7L Powerstroke?
A: Hold the old lower filter, slide it fully to the right, then pull it upward and out. Clean the housing, lubricate the new O-ring lightly with clean diesel and seat it evenly. Insert the new filter vertically on the right side and slide it fully to the left until it locks, then confirm the filter cannot wiggle or drop out. The engine-mounted upper filter threads onto the housing and should be tightened by hand plus a quarter turn only.
Every iFJF fuel filter is manufactured in a facility certified to ISO 9001:2015 and IATF 16949:2016 quality management standards.
