FASS DIFSFRD1001 Drop-In Series Diesel Fuel System | 2017-2025 Ford F250/F350 Super Duty 6.7L Powerstroke
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The FASS DIFSFRD1001 Drop-In Series Diesel Fuel System is a drop-in filtration and air separation system for 2017-2025 Ford F250/F350 Super Duty trucks with the 6.7L Powerstroke. It mounts in the factory water separator location, keeps the factory in-tank lift pump, and retains the factory water-in-fuel sensor. FASS lists a 2 micron absolute filtration rating and over 99% free and emulsified water separation.
Check Your Truck First
| Status | Application |
|---|---|
| ✅ Fits | 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 Ford F250/F350 Super Duty with the 6.7L Powerstroke diesel |
| ✅ Retains | The factory in-tank lift pump and the water-in-fuel sensor |
| ❌ Not compatible | Gasoline engines |
| ❌ Does not fit | Cab and chassis configurations |
| ❌ Check first | Trucks with aftermarket high-capacity fuel tanks. FASS says it may not fit, so verify space before purchase. |
| ❌ Not listed in the product title | F450. FASS's fitment line mentions it, so chat with us to confirm before ordering. |
Why Owners Install It
- 2 micron absolute filtration rating, with over 99% free and emulsified water separation from FASS's Extreme Water Separator technology
- Internal air separation passages that FASS says remove entrained air and air vapor before fuel reaches the injectors
- FASS says removing entrained air increases the lubricity of the fuel by up to 10%
- Retains the factory water-in-fuel sensor and the factory in-tank lift pump
- Drop-in design that FASS says needs no cutting, wiring, or additional hardware for most installs
What to Expect
- The system mounts in the factory water separator location.
- FASS describes it as 100% drop-in. For most installs, no cutting, wiring, or additional hardware is needed.
- The factory in-tank lift pump stays in place.
- If you have an aftermarket high-capacity fuel tank, verify there is space before you order.
- Electric heater add-ons are available for cold climates. The source doesn't list a part number or whether they are included, so chat with us before ordering.
- Install time, filter change intervals, and step-by-step instructions are not listed.
Specifications
| Brand | FASS |
|---|---|
| Part Number | DIFSFRD1001 |
| Product Type | Drop-In Series Diesel Fuel System |
| Fits | 2017-2025 Ford F250/F350 Super Duty 6.7L Powerstroke |
| Filtration | 2 micron absolute |
| Water Separation | Over 99% free and emulsified water, with Extreme Water Separator technology |
| Air Separation | Internal air separation passages |
| Flow Design | Performance Radius Cuts |
| Lubricity | FASS states an increase of up to 10% from removing entrained air and air vapor |
| Water-in-Fuel Sensor | Factory sensor retained |
| Lift Pump | Factory in-tank lift pump retained |
| Mounting | Factory water separator location |
| Install | Drop-in. No cutting, wiring, or additional hardware for most installs. |
| Cold Weather | Electric heater options available |
| Tuning Required | Not listed |
| Install Time | Not listed |
| Warranty | Not listed |
| Emissions | Not listed |
FAQs
What trucks does the DIFSFRD1001 fit?
It is listed for 2017-2025 Ford F250/F350 Super Duty trucks with the 6.7L Powerstroke diesel. It is not for gas engines or cab and chassis trucks.
Do I have to modify my truck?
FASS describes it as 100% drop-in. It mounts where the factory water separator sits, and for most installs no cutting, wiring, or additional hardware is needed.
Does it keep my water-in-fuel sensor?
Yes. FASS states the system retains the factory water-in-fuel sensor.
Does it replace my factory lift pump?
No. It retains the factory in-tank lift pump.
How well does it filter water and debris?
FASS lists a 2 micron absolute filtration rating and over 99% free and emulsified water separation.
Will it work in cold weather?
FASS offers electric heater options for improved cold weather reliability. The source doesn't say which parts they are or whether they come with the system, so chat with us before ordering.
Questions about fitment? Chat with us.