Description
Product Overview
The iFJF FA1778 Engine Air Filter is a direct OEM-spec replacement for the 6.0L Powerstroke V8 diesel engine in 2003-2007 Ford F250, F350, F450, F550 Super Duty and 2003-2005 Excursion. Manufactured with high-capacity pleated cellulose media, this filter traps dirt, dust, and debris while maintaining the airflow your turbocharged diesel demands. Replaces Ford 4C3Z-9601-AA, 3C3U-9601-BC, Motorcraft FA-1778, and multiple aftermarket equivalents.
Key Features
-
OEM-Spec Pleated Cellulose Media: Engineered to match the filtration efficiency and airflow capacity of the factory Motorcraft FA-1778 filter — protects your 6.0L turbocharger from dust and debris ingestion.
-
6.0L Powerstroke Specific: Direct drop-in replacement for 2003-2007 6.0L Powerstroke V8 diesel — F250 through F550 Super Duty and 2003-2005 Excursion.
-
Extensive Cross-Reference Coverage: Replaces FA1778, 4C3Z-9601-AA, 3C3U-9601-BC, 3C3Z-9601-BA, A2991C, AF26152, CA9516, MA 1155, FA-1746, 42731, CA4999, P603577.
-
Turbocharger Protection: A clean air filter is the 6.0L Powerstroke's first line of defense against turbocharger damage. Replace every 15,000-30,000 miles depending on driving conditions.
-
High Dirt-Holding Capacity: The deep-pleat design maximizes filter surface area for extended service intervals and consistent airflow throughout the filter's lifespan.
Specifications
| Specification |
Detail |
| Part Number |
FJ-1778 |
| OEM Reference |
4C3Z-9601-AA, 3C3U-9601-BC, 3C3Z-9601-BA, FA1778, FA-1778 |
| Cross Reference |
A2991C, AF26152, CA9516, MA 1155, FA-1746, 42731, CA4999, P603577 |
| Media Type |
Pleated Cellulose (OEM-Spec) |
| Engine |
6.0L Powerstroke V8 Turbo Diesel |
| Fits |
F250 F350 F450 F550 2003-2007 | Excursion 2003-2005 |
| Service Interval |
15,000-30,000 Miles (More Frequent in Dusty Conditions) |
| Warranty |
12-Month Warranty |
Why Choose iFJF?
The 6.0L Powerstroke's variable-geometry turbocharger is sensitive to intake restriction and contaminant ingestion. A clogged or low-quality air filter can cause turbo underboost, reduced fuel economy, black smoke, and in severe cases — turbocharger damage. Our iFJF FA1778 filter provides OEM-equivalent filtration and airflow at a competitive price point, helping you maintain your 6.0L's performance and longevity.
Frequently Asked Questions
Q: Will this fit my 2005 F350 6.0L Powerstroke?
A: Yes. Direct drop-in replacement for all 2003-2007 F250, F350, F450, F550 Super Duty and 2003-2005 Excursion with the 6.0L Powerstroke V8.
Q: How often should I replace the air filter?
A: Ford recommends every 30,000 miles under normal conditions. If you drive on dirt roads, tow frequently, or operate in dusty environments, replace every 15,000 miles.
Q: Does this fit the 7.3L or 6.4L Powerstroke?
A: No. This filter is specifically for the 2003-2007 6.0L Powerstroke. The 7.3L and 6.4L use different air filter designs.
Q: Is this a washable/reusable filter?
A: No. This is a traditional pleated cellulose disposable filter. Replace it at the recommended interval — do not attempt to wash and reuse.
Q: What are signs of a clogged air filter?
A: Reduced power/boost, black smoke from exhaust, decreased fuel economy, turbo lag, and a check engine light with underboost codes (P0299).
Q: How does this compare to K&N or other performance filters?
A: This is an OEM-spec paper filter — optimized for filtration efficiency and engine protection. Performance oiled filters may flow more air but typically allow more particulates through. For stock and mildly tuned 6.0L engines, we recommend OEM-spec filtration.
Q: Does this include the filter minder/restriction gauge?
A: No. The filter minder is part of the air intake housing, not the filter element. If your filter minder indicates restriction, replace the filter.
