Description The AEM 21-686C 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 is designed, tuned and dyno-tested to fit specific Honda Civic 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 located above the driver’s 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 mass air flow sensor and PCV hose. The cone 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 21-686C vehicle applications to determine the legal status for each vehicle. MORE INFORMATION Increased horsepower Tuned and dyno-tested to improve acceleration and engine sound Low restriction aluminum tubing Air filter lasts up to 100,000 miles before cleaning is required (depending on driving conditions) Washable and reusable oil-free filter media AEM Lifetime Limited Warranty SPECIFICATIONS Estimated Horsepower Gain 4 HP @ 3800 RPM Replacement Filter 21-201DK Air Filter Color Red Air Filter Material Non-woven Synthetic Air Filter Outlet Shape Round Clamps Included 9 Clamp Material Steel Clamp Style Regular Couplers Included 1 Product Style AEM Cold Air Intake System Intake Pipe Color / Finish Gunmetal Gray Intake Pipe Material Aluminum CARB EO Number D-670-21 Street Legal In All US States Yes TUV Approved (Europe) No Weight 10 lb (4.5 kg) Product Box Height 12.25 in (311 mm) Product Box Length 20.25 in (514 mm) Product Box Width 12.25 in (311 mm) Mounting Hardware Included Yes Warranty Limited Lifetime VEHICLE APPLICATIONS Supported Vehicles 2011 Honda Civic 1.8L L4 Gas Except GX Street Legal in All US States: Yes CARB EO Number: D-670-21 2010 Honda Civic 1.8L L4 Gas Except GX Street Legal in All US States: Yes CARB EO Number: D-670-21 2009 Honda Civic 1.8L L4 Gas Except GX Street Legal in All US States: Yes CARB EO Number: D-670-21 2008 Honda Civic 1.8L L4 Gas Except GX Street Legal in All US States: Yes CARB EO Number: D-670-21 2007 Honda Civic 1.8L L4 Gas Except GX Street Legal in All US States: Yes CARB EO Number: D-670-21 2006 Honda Civic 1.8L L4 Gas Except GX Street Legal in All US States: Yes CARB EO Number: D-670-21
