FA1778 AIR FILTER FOR 6.0L POWERSTROKE 2003-2007 FORD SUPER DUTY

iFJF part No.: FJ-1778. 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.