ECOGARD XA5535 Premium Engine Air Filter Fits Ford F-250 Super Duty, F-350 Super Duty, Excursion, F-450 Super Duty, F-550 Super Duty COMPATIBLE with 2003-2007 Ford F-250 Super Duty, 2003-2007 Ford F-350 Super Duty, 2003-2005 Ford Excursion, 2003-2007 Ford F-450 Super Duty, 2003-2007 Ford F-550 Super Duty. IMPROVE PERFORMANCE by changing your vehicle's air filter at least every 12,000 miles (or as recommended in your car owner's manual); to ensure your vehicle's engine has the clean and efficient air flow it needs for fast acceleration and long term power. AVOID INCREASED ENGINE WEAR caused by dirty air intake filters that may allow damaging particles to get into the engine. FACTORY FIT FOR EASY INSTALLATION. Replaces: FRAM CA9516 Purolator A45535 WIX 42731 Motorcraft FA1778 OE 3C3Z-9601BA. SPECIFICALLY ENGINEERED AND TESTED for Ford OE (original equipment) engine air filter's fit, form, and function.