Keep fuel metering crisp and combustion efficient with the Standard Ignition Fuel Injector FJ1539, a 100% new multiport (MFI) injector built specifically for Ford engines. Flagged as an O.E.M. replacement, it drops in for the 2020-2026 Ford F-250, F-350 and F-450 Super Duty (V8-7.3L), 2023-2025 F-250 and F-350 Super Duty (V8-6.8L), 2020-2025 F-53 Motorhome Chassis and F-550 Super Duty (V8-7.3L), 2021-2023 and 2026 E-350 Super Duty (V8-7.3L), 2021-2023 E-450 Super Duty (V8-7.3L), and 2021-2026 F-650 and F-750 (V8-7.3L) — see the Buyer's Guide tab for the full list.
- 100% new build: assembled with no remanufactured components.
- Corrosion-resistant brass terminals: a two-terminal, male blade plug-in connector for consistent electrical contact.
- Stainless steel calibration slide and spring: add corrosion resistance for consistent, long-term performance.
- Engine-specific metering: laser-drilled metering discs and a high-precision nozzle calibrate fuel flow and spray pattern for atomization, designed to help restore engine performance and support fuel economy.
- High-temperature Viton O-rings: included seals designed to seal in extreme conditions and guard against fuel leaks.
Each unit is end-of-line tested and calibrated, and validated through lab, climate, and real-world testing in the USA. The listed engines use eight injectors; this listing is for one injector and includes O-rings/seals. Retainer clips are not included. Made in the United States. Manufacturer part number FJ1539.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does the Standard Ignition FJ1539 fuel injector do?
It's a multiport (MFI) fuel injector that sprays metered fuel into the intake port for combustion. Laser-drilled metering discs and a high-precision nozzle calibrate the fuel flow rate and spray pattern.
Which vehicles does the FJ1539 fit?
It's an O.E.M. replacement for Ford V8-7.3L models — E-350/E-450 Super Duty, F-250/F-350/F-450/F-550 Super Duty, F-53 Motorhome Chassis, F-650 and F-750 — plus 2023-2025 F-250/F-350 V8-6.8L. See the Buyer's Guide.
How many injectors do I need?
The listed engines use eight injectors each. This listing is for one injector, so order eight for a complete set per engine.
Are O-rings and seals included?
Yes, the injector ships with O-rings/seals. Retainer clips are not included, so consult the vehicle service information for any additional hardware you may need.
Is this a new or remanufactured injector?
It's 100% new with no remanufactured components, and each unit is end-of-line tested and calibrated before it ships.
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