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AEM Cold Air Intake System 21-685C for Honda Civic 2006-2011 2.0L 4-Cyl Gunmetal Gray - 21-685C

If you're looking to give your Honda Civic SI or Acura ILX a little extra oomph, the AEM 21-685C Performance Cold Air Intake System is where it’s at. This isn’t just another air intake; it’s a serious upgrade that replaces your factory setup, which can be pretty restrictive. I mean, who wants to choke their engine with that? With this kit, you’re looking at about a 6.27 HP gain at 5100 RPM, which is definitely noticeable when you hit the gas.

The design is pretty slick too. The oversized AEM Dryflow synthetic washable air filter sits in the driver-side wheel well, which helps keep the intake air cooler. Cooler air means better performance, and it’s all about that airflow. The intake tubing is made of mandrel-bent aluminum and comes in a gunmetal gray powder-coated finish that looks sharp under the hood. Plus, it’s built to work with your car’s emissions control devices, so you’re not going to run into any issues there.

One of the best parts? That air filter can go for up to 100,000 miles before needing a clean, depending on your driving style. Just wash it, let it dry, and you’re good to go—no messy oil needed. And if you’re in California or any state that follows CARB standards, you’ll be glad to know it’s CARB exempt with EO number D-670-21, so you can install it without worries about legality.

Features

  • Air Box Included: No
  • Air Filter Color: Red
  • Air Filter Height: 5.125 in (130 mm)
  • Air Filter Large End Diameter: 6 in (152 mm)
  • Air Filter Material: Non-woven Synthetic
  • Air Filter Outlet Length: 3 in (76 mm)
  • Air Filter Outlet Shape: Round
  • Air Filter Outlet Width: 3 in (76 mm)
  • Air Filter Washable: Yes
  • CARB EO Number: D-670-21
  • Clamp Color/Finish: Natural
  • Clamp Material: Stainless Steel
  • Clamp Style: Mini
  • Clamps Included: 11
  • Coupler Color/Finish: Not Applicable
  • Couplers Included: None
  • Estimated Horsepower Gain: 6.27 HP @ 5100 RPM
  • Horse Power Increase: 6 HP
  • Intake Pipe Color / Finish: Gunmetal Gray
  • Intake Pipe Inlet Length: 7 in (178 mm)
  • Intake Pipe Inlet Shape: Round
  • Intake Pipe Inlet Width: 3 in (76 mm)
  • Intake Pipe Material: Aluminum
  • Intake Pipe Outlet Length: 23 in (584 mm)
  • Intake Pipe Outlet Shape: Round
  • Intake Pipe Outlet Width: 3 in (76 mm)
  • Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
  • Mounting Hardware Included: Yes
  • Oil Included: No Filter Oil Required
  • Package Material: Paperboard
  • Package Type: Box
  • Product Style: AEM Cold Air Intake System
  • Prop 65 (C, R or CR): CR
  • Prop 65 - Short Label: WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
  • Prop 65 Warning Label: View Here
  • Prop 65 Yes/No: Yes
  • Replacement Filter: 21-203DK
  • RPM: 5100
  • Street Legal In All US States: Yes
  • Title: AEM AEM-21-685C AEM Cold Air Intake System
  • TUV Approved (Europe): No
  • Warranty: Limited Lifetime
  • Weight: 8.2 lb (3.7 kg)

Notes:

California Air Resources Board Exempt: Yes; CARB EO: D-670-21; AEM - Metal Intake System; Gunmetal Gray (CAS)

Fits Honda Civic models from 2006 to 2011 with a 2.0L 4-cylinder engine. If you’re serious about performance, this is a solid step up.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2006-2011
 Honda Civic
AEM Intake

AEM intake offers the very best cold air intake systems on the market, providing drivers with everything they need to get the most out of their vehicle. At Vivid Racing, we are proud to offer our customers AEM cold air intake systems, providing this trusted and reliable brand to all types of drivers.

Whether you are part of a professional race team or just like to push your car to the limit, an AEM intake system is a welcome addition to your vehicle.

What Is an AEM Cold Air Intake System?

An AEM cold air intake system is specifically designed to increase the volume of cold air flowing into your engine as you drive. The thinking behind this is that cold air is much denser than warm air. Therefore, if there is more cold air in your engine, there is more air in general, which also means that there is more oxygen. A higher amount of oxygen present in a car engine increases the potency of combustion, which can increase the power and efficiency of your engine.

What Are the Benefits of an AEM Intake System?

An AEM intake kit maximizes the amount of power you can get from your engine. This increase in power will also help you conserve fuel and increase your fuel efficiency, saving you money at the gas station. In a sense, an AEM intake system helps your car and engine “breathe” more efficiently, allowing it to reach its full potential.

Why Should I Choose an AEM Intake Kit?

AEM is regarded as one of the best aftermarket intake systems on the market, combining quality materials, cutting-edge technology and reliable design to help drivers around the globe improve the power of their engine. All AEM cold air intake systems are engineered to increase your car’s torque and horsepower, and any AEM intake kit comes with a lifetime limited warranty.

Purchase an AEM Cold Air Intake From Vivid Racing Today

Take your driving experience to the next level by purchasing an AEM cold air intake from Vivid Racing. We’ll help you find an AEM intake and air filter that perfectly fits your specific needs. To learn more or to order an AEM intake kit, contact Vivid Racing by calling (480) 966-3040.

Aem Lifetime Limited Warranty- This Limited Warranty Gives You Specific Legal Rights And You May Also Have Other Rights, Which Vary From State To State. [This Limited Warranty Can Also Be Found Online At Www.Aemintakes.Com/Warranty. We Limit The Duration And Remedies Of All Implied Warranties, Including, Without Limitation, The Warranties Of Merchantability And Fitness For A Particular Purpose To The Duration Of This Express Limited Warranty. Some States Do Not Allow Limitations On How Long An Implied Warranty Lasts. What Does This Warranty Cover? This Warranty Covers Defects In Materials And Workmanship Of Your Aem Air Intake System Or Aem Oe Replacement Filter (The "Product"), With The Exceptions Stated Below.

Aem One-Year Limited Warranty - This Limited Warranty Gives You Specific Legal Rights And You May Also Have Other Rights, Which Vary From State To State. This Limited Warranty Can Also Be Found Online At Www.Aemintakes.Com/Warranty . We Limit The Duration And Remedies Of All Implied Warranties, Including, Without Limitation, The Warranties Of Merchantability And Fitness For A Particular Purpose To The Duration Of This Express Limited Warranty. Some States Do Not Allow Limitations On How Long An Implied Warranty Lasts. What Does This Warranty Cover? This Warranty Covers Defects In Materials And Workmanship Of Your Aem Universal & Special Air Filter Or Aem Accessory (The "Product"), With The Exceptions Stated Below.

Aem 90-Day Limited Warranty - This Limited Warranty Gives You Specific Legal Rights And You May Also Have Other Rights, Which Vary From State To State. This Limited Warranty Can Also Be Found Online At Www.Aemintakes.Com/Warranty. We Limit The Duration And Remedies Of All Implied Warranties, Including, Without Limitation, The Warranties Of Merchantability And Fitness For A Particular Purpose To The Duration Of This Express Limited Warranty. Some States Do Not Allow Limitations On How Long An Implied Warranty Lasts. What Does This Warranty Cover? This Warranty Covers Defects In Materials And Workmanship Of Your Aem Accessory, Clothing, Promotional Material Or Raw Material (The "Product"), With The Exceptions Stated Below.

What Do These Warranties Not Cover:This Warranty Does Not Cover Damage Due To (A) Transportation, (B) Storage, (C) Improper Use, (D) Failure To Follow The Product Instructions Or To Perform Any Preventive Maintenance, (E) Modifications, (F) Unauthorized Repair, (G) Normal Wear And Tear, (H) Any Type Of Racing Or Competition, (I) Any Off-Road Use Or (J) External Causes Such As Accidents, Abuse, Or Other Actions Or Events Beyond Our Reasonable Control (E.G., Acts Of God And Natural Disasters).

What Will Aem Do? We Will Repair Any Product That Proves To Be Defective In Materials Or Workmanship. If Repair Is Not Possible, We Will Either Replace Your Product With A New Product Of Similar Composition And Price, Or Refund The Full Purchase Price Of Your Product, At Our Sole Discretion. There Is No Charge For Inspection.

How Do I Get Service?If You Are Ever Dissatisfied With The Materials, Workmanship Or Performance Of This Product, Just Give Aem A Call At 1-800-992-3000 And We Will Be Happy To Assist You.

Limitation Of Liability The Remedies Described Above Are Your Sole And Exclusive Remedies And Our Entire Liability For Any Breach Of This Limited Warranty. Our Liability Shall Under No Circumstances Exceed The Actual Amount Paid By You For The Product, Nor Shall We Under Any Circumstances Be Liable For Any Consequential, Incidental, Special Or Punitive Damages Or Losses, Whether Direct Or Indirect.

Installation Instructions

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Dyno Sheet

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