AEM 3 inch x 9 inch DryFlow Air Filter

Product Overview

AEM 3 inch x 9 inch DryFlow Air Filter from AEM Induction is identified by manufacturer part number 21-2039DK. This AEM universal air filter uses non-woven synthetic and is selected by flange diameter, overall dimensions, and available installation space rather than vehicle appearance alone. Match every listed measurement to the intake tube and surrounding clearance before ordering.

Key Features

• Designed for specification-matched custom intake applications; verify inlet diameter, outside dimensions, filter length, mounting space, and airflow direction.
• New AEM Induction component supplied in the configuration shown and described on this page.
• Exact application, dimensions, and included components should be verified before installation.

Fitment

AEM Induction 21-2039DK is a universal or specification-matched component. Confirm dimensions, inlet or outlet size, filter shape, mounting space, sensors, hoses, and system compatibility before ordering.

Specifications

What’s Included

The exact air filters – universal fit product identified by AEM Induction 21-2039DK. Additional filters, tubes, couplers, clamps, heat shields, sensors, hardware, or service supplies are included only when specifically shown or stated.

About AEM Induction

AEM Induction develops vehicle-specific and universal intake, filtration, and supporting components for street and performance applications. Black Ops Auto Works organizes each listing by exact part number and available fitment data to support accurate product selection.

Related Parts

• AEM Dryflow Air Filter for 07-16 Audi A4 1.8L TFSI
• AEM DryFlow Conical Air Filter 5.5in Base OD / 4.75in Top OD / 5in Height
• Shop the complete AEM Induction collection

Frequently Asked Questions

What is the 21-2039DK?

It is the AEM Induction air filters – universal fit product described on this page in the listed configuration.

How do I confirm fitment?

Match the complete vehicle, engine, trim, intake layout, dimensions, sensors, and every application note before ordering.

Can I select this product by appearance alone?

No. Similar-looking intake and filter components can use different dimensions, connections, sensor provisions, mounting points, or applications.

What is included?

Only the components specifically identified on this product page are included; related filters, tubes, couplers, clamps, hardware, or service supplies may be separate.

Does an intake require tuning?

Tuning requirements vary by vehicle and intake configuration. Review the product notes and consult a qualified tuner when airflow or sensor behavior changes.

How should I maintain the filter?

Follow the filter-specific manufacturer instructions. Cleaning and treatment procedures vary by filter media and should not be assumed.

Is this product new?

Yes. The item condition is new unless this page explicitly states otherwise.

What should I verify before checkout?

Confirm the application, dimensions, included items, filter type, sensor provisions, emissions notes, and installation requirements.

Installation Instructions

1. Confirm AEM Induction 21-2039DK and the complete application before disassembly.
2. Inspect the component and compare every tube, filter, coupler, clamp, sensor provision, mounting point, and included item before modifying the vehicle.
3. Follow current AEM Induction instructions and the vehicle service procedure for removal, installation, fasteners, sensors, hoses, and wiring.
4. Keep intake components sealed and routed away from heat, sharp edges, moving parts, and direct water exposure where applicable.
5. Check all connections, start the vehicle, inspect for leaks or warning lights, and verify safe operation before driving.

California Proposition 65 Warning

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.