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AEM Cold Air Intake System Increases Horsepower of 2006 to 2011 Honda Civic Si

Dyno Chart for 2006 to 2011 Honda Civic Si Cold Air Intake
Dyno Chart for 2006 to 2011 Honda Civic Si Cold Air Intake
The 2009, 2010 and 2011 Honda Civic Si is a sporty compact car with remarkable style and comfort. Equipped with a high-output 2.0 liter engine, sport-tuned suspension, stability control and roomy interior, the 2006 to 2011 Civic Si is half racecar and half family car. If that isn't enough to intrigue you, the impressive gas mileage, kickin' sound system with steering wheel controls, race-style seating and large trunk make this car a very fun and practical daily driver.
AEM Cold Air Intake System for the 2006 to 2011 Honda Civic Si
AEM Cold Air Intake System for the 2006 to 2011 Honda Civic Si


One downfall with the 2006 to 2011 Civic Si engine is the lack of power at lower RPM's. AEM has addressed this issue with the release of their Cold Air Intake Systems 21-685C and 21-685P. These intakes were specially designed to fit into the cramped engine compartment while delivering more horsepower. This is accomplished by using a custom aluminum intake tube that lowers restriction and an AEM air filter that is located away from the engine to provide cooler air to the engine.

AEM intake systems are dyno tuned and tested for specific applications. The 21-685C and 21-685P were dyno tested and showed an increase of 6.27 horsepower at 5100 rpm. The 21-685C intake system comes with a gunmetal gray intake tube and the 21-685P comes with a polished tube. Both intake systems utilize the oversized AEM DRYFLOW air filter (21-203DK). The 21-203DK is a washable oil-free air filter designed for high air flow and great filtration.

AEM cold air intakes come with detailed instructions to assist with the installation of the system. The Dyno Chart and vehicle applications for this intake are available on our website. For more information on AEM products for the Honda Civic Si or any other vehicle use the AEM Product Search on aemintakes.com. Use our Where to Buy page to find an AEM dealer near you.

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