The AEM 21 - 742C Cold Air Intake System is a game - changer for your Subaru Forester. It boosts horsepower and torque by swapping out your car's restrictive factory air filter and intake housing. Specifically designed, tuned, and dyno - tested for certain Subaru Forester models, this system draws air through an extra - large AEM Dryflow synthetic washable air filter. This filter offers amazing air flow, top - notch filtration, and excellent performance. Positioned in the original air box space, it's shielded by a heat shield. The heat shield cuts down the intake air temperature, which in turn ups the horsepower. The intake tubing is crafted from mandrel - bent aluminum with a tough gunmetal gray powder - coated finish. It's also developed to work with the engine's factory emissions control devices, including the mass air sensor. The AEM Dryflow air filter, shaped like a tapered cylinder, is made of oil - free synthetic filter media. You can use it for up to 100,000 miles before cleaning (depending on your driving conditions). Installation is a breeze with commonly available tools. Note that some AEM air intakes aren't legal in California and other states following California emission standards, while others are legal across all 50 states. Check the 21 - 742C vehicle applications to know the legal status for your vehicle. Part #: 21 - 742C


Using this AEM Cold Air Intake System is easy. First, make sure you have commonly available tools handy. Remove the old, restrictive air filter and intake housing from your Subaru Forester XT 2014 - 2017. Then, install the new AEM system in the original air box space. The system is designed to fit properly, so it should go in smoothly. As for maintenance, the AEM Dryflow air filter can last up to 100,000 miles before needing a clean, but this depends on your driving conditions. If you drive in dusty or dirty areas, you might need to clean it earlier. To clean the filter, just follow the instructions provided by AEM. Also, be aware of the legal status of this air intake in your state. Some states have strict emission standards, so check the 21 - 742C vehicle applications to make sure it's legal for your use.