The AEM 21-8104DC Brute Force Air Intake System produces horsepower and torque gains for high displacement engines by replacing the vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Ford F250/F350 Super Duty, F250/F350 Harley Davidson Super Duty and Excursion models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The intake tubing is constructed from mandrel-bent aluminum featuring a durable gunmetal gray powder coated finish. This air intake system was developed to accommodate the engine's factory emissions control devices including the mass air flow sensor, air filter status meter and air temperature sensor where equipped. The cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is backed by AEM's Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards while others are 50 state legal. View the 21-8104DC vehicle applications to determine the legal status for each vehicle.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
2003-2005	Ford	Excursion	Eddie Bauer
2003-2005	Ford	Excursion	Limited
2004-2005	Ford	Excursion	XLS
2003-2005	Ford	Excursion	XLT
2004-2005	Ford	F-250 Super Duty	Harley-Davidson Edition
2004-2006	Ford	F-250 Super Duty	King Ranch
2003-2006	Ford	F-250 Super Duty	Lariat
2003-2006	Ford	F-250 Super Duty	XL
2003-2006	Ford	F-250 Super Duty	XLT
2004-2005	Ford	F-350 Super Duty	Harley-Davidson Edition
2003-2006	Ford	F-350 Super Duty	King Ranch
2003-2006	Ford	F-350 Super Duty	Lariat
2003-2006	Ford	F-350 Super Duty	XL
2003-2006	Ford	F-350 Super Duty	XLT