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This AEM intake system is engineered for 2006 Saab 9-2X and the other applications listed below, replacing restrictive factory intake components with application-specific airflow routing and serviceable filtration. The gunmetal gray aluminum intake tube is configured for the factory interfaces used by this application. Confirm the complete vehicle, engine, trim, and emissions notes in the fitment section before ordering.
Key Features
- Application-specific intake routing for the listed vehicle and engine
- Aluminum intake tube construction
- Non-woven Synthetic air-filter media
- Exact manufacturer part number: 21-477C
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2006 | Saab | 9-2X | 2.5i |
| 2006 | Saab | 9-2X | Aero |
| 2004-2005 | Subaru | Forester | XT |
| 2005 | Subaru | Forester | XT Premium |
| 2006-2007 | Subaru | Impreza | WRX |
| 2006-2007 | Subaru | Impreza | WRX Limited |
| 2004-2007 | Subaru | Impreza | WRX STI |
| 2007 | Subaru | Impreza | WRX STI Limited |
Specifications
| Brand | AEM Induction |
|---|---|
| Manufacturer Part Number | 21-477C |
| Product Type | Cold Air Intakes |
| Condition | New |
| Air Box Included | No |
| Air Filter Color | Red |
| Air Filter Material | Non-woven Synthetic |
| Air Filter Outlet Shape | Round |
| Air Filter Washable | Yes |
| CARB EO Number | D-670-15 |
| Clamp Color/Finish | Natural |
| Clamp Material | Steel |
| Clamp Style | Regular |
| Clamps Included | 5 |
| Coupler Color/Finish | Black |
| Couplers Included | 1 |
| Intake Pipe Color / Finish | Gunmetal Gray |
| Intake Pipe Material | Aluminum |
| Intake Pipe Ports | All intake tube ports needed for the specified applications are included |
| Mass Air Flow Sensor Adapter Included | Yes |
| Mounting Hardware Included | Yes |
| Oil Included | No |
| Product Style | AEM Cold Air Intake System |
| Replacement Filter | 21-2038DK |
| Street Legal In All US States | See Vehicle Applications |
| TUV Approved (Europe) | No |
| Warranty | Limited Lifetime |
| Weight | 6 lb (2.7 kg) |
What's Included
- AEM intake tube or intake assembly shown for this exact part number
- AEM air filter
- Couplers: 1
- Clamps: 5
- Application-specific mounting hardware
Any item not identified above or in the manufacturer specifications is not assumed to be included.
About AEM Induction
AEM Induction develops application-specific air-intake systems, Dryflow filtration products, intake fabrication components, and related induction hardware for street and performance applications.
Related Parts
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- Shop the complete AEM Induction collection
Frequently Asked Questions
Will AEM 21-477C fit my 2006 Saab 9-2X?
This listing is organized for 2006 Saab 9-2X 2.5i, 2006 Saab 9-2X Aero, 2004-2005 Subaru Forester XT. Match the engine, trim, emissions equipment, and every fitment note to AEM MPN 21-477C.
Does AEM intake 21-477C require an ECU tune?
Many AEM intake systems are designed as bolt-on hardware, but calibration needs depend on the vehicle, airflow-meter strategy, and other modifications. Follow the current AEM instructions for this exact MPN.
Will the factory MAF sensor and emissions equipment remain compatible?
Compatibility is application specific. Confirm the MAF housing, sensor orientation, breather connections, and emissions provisions shown for this exact kit before installation.
What changes should I expect in intake sound and throttle response?
An intake can make induction sound more noticeable and may sharpen response, but the result varies with the engine, calibration, exhaust, and other modifications.
How should I protect the filter from water exposure?
Keep the inlet and filter away from standing water and direct splash. Do not drive through water deep enough to submerge or saturate the filter.
Is the air filter reusable, and does it require oil?
Use the cleaning method specified for the exact filter supplied with this MPN. AEM Dryflow filters are serviced without filter oil; do not assume a different filter media uses the same procedure.
Installation Instructions
- Confirm AEM part number 21-477C, the complete application, and all included components before starting.
- Disconnect the battery when required, then remove the factory intake only as directed by AEM's current instructions.
- Transfer factory sensors, grommets, and breather connections in their specified orientation without contaminating or damaging them.
- Assemble the tube, filter, couplers, clamps, heat shielding, and brackets loosely; align for clearance before final tightening.
- Verify every connection is sealed, reconnect the battery, check for warning lights or intake leaks, and recheck clamps after the first heat cycles.
California Proposition 65 Warning
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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