AEM 21-466C Gun Metal Cold Air Intake System

Why Upgrade Your 2006–2011 Civic with the AEM 21-466C?

Because your R18 deserves better than sounding like a vacuum cleaner at 5,000 rpm.

With the AEM 21-466C you get:

• Noticeably better throttle response

• More airflow than the restrictive OEM box

• Clean, deep induction sound (finally some personality)

• Lightweight aluminum piping with a slick gunmetal finish

• AEM Dryflow filter — washable, reusable, no oil needed

• MAF-friendly design to keep drivability smooth

This intake doesn’t turn the R18 into a race engine… but it does make the car feel less like a commuter appliance.

AEM Air Intake Systems are designed to produce massive horsepower and torque gains as well as better engine sound when used as a replacement for the factory airbox and air filter.

Key Features of the AEM 21-466C

🌀 Mandrel-Bent Aluminum Intake Tube

Smooth airflow into the R18 intake manifold, improving response and reducing restriction.

🧼 AEM Dryflow High-Flow Filter

No oil, no mess, no MAF sensor panicking about life choices.

❄ True Cold Air Placement

Mounts low in the bumper area for cooler incoming air temps.

🔧 OEM-Compatible Mounting

Uses factory mounting points and the proper MAF housing scaling.

💨 Better Sound Without Drone

Hear your engine breathe without making your Civic unbearable on the freeway.

AEM intake systems are designed, tuned, and dyno-tested to fit specific cars and trucks. These air intakes usually include an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration, and performance while allowing easy oil-free cleaning.

Performance Gains You Can Expect

Typical gains on the 1.8L Civic include:

• Improved low- and mid-range response

• Sharper throttle transitions

• Slight bump in horsepower

• Much better induction sound

Pair it with an axle-back and the car actually feels alive.

Most AEM intake systems use mandrel-bent aluminum intake tubes, powder coated heat shields, and high quality hardware designed to reduce restriction and reduce intake temperature.

Installation Notes

Most owners install it in under 90 minutes.

You’ll:

1. Remove the factory airbox

2. Install the lower cold-air section

3. Route the intake tube

4. Plug in the MAF

5. Install the Dryflow filter

6. Tighten everything, check clearances, and enjoy

If you can operate a screwdriver, you can handle this.

The design and components of each intake system vary so consult the installation instructions for more information on the contents of each part number. AEM manufactures a variety of intake kit styles including short ram intakes, cold air intakes, dual-chamber intakes, Brute Force intakes for trucks and SUV’s, and Brute Force HD intakes for diesel applications.