The AEM 21-450C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno-tested to fit specific Ford Focus models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is relocated to the driver-side wheel well which is designed to reduce intake air temperature and increase horsepower. 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 MAF and engine breather hose. The tapered 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 21-450C vehicle applications to determine the legal status for each vehicle.
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
2000-2003	Ford	Focus	LX
2000-2003	Ford	Focus	SE
2000	Ford	Focus	Sony Limited Edition
2000-2003	Ford	Focus	ZTS
2002-2003	Ford	Focus	ZTW
2000-2003	Ford	Focus	ZX3
2002-2003	Ford	Focus	ZX5