Description
The AEM 21-732C provides a gunmetal gray aluminum intake system for supported WRX 2.0L applications. The reusable Dryflow filter occupies the original airbox area and is protected by an application-specific heat shield.
Design and operation
Mandrel-bent tubing provides a smooth air path and accommodates the factory mass airflow sensor. The shield helps separate the filter from nearby engine-bay heat. Sensor placement and sealed connections are important to the completed installation.
Key specifications
- Manufacturer part number: 21-732C
- Gunmetal gray aluminum tube; heat shield; factory MAF provision.
- Washable, reusable, oil-free synthetic Dryflow filter.
- Replacement filter: 21-2027DK.
Installation and compatibility
Confirm the 2.0L WRX application. This part should not be selected for a 2.5L STI or later 2.4L WRX based on the Subaru model family alone. Follow the installation instructions and confirm calibration compatibility with the vehicle’s existing modifications.
Maintenance
Inspect the filter according to dust exposure and use. Clean it with a cleaner suitable for the Dryflow media, allow it to dry fully and do not apply filter oil. Check clamps and connections during routine servicing.
Important application notes
Manufacturer emissions documentation identifies CARB EO D-670-26. Eligibility depends on the exact vehicle being covered by the applicable approval and installation conditions.
Vehicle fitment
The following catalog applications include trim-specific year ranges. Confirm the exact vehicle before ordering; listed fitment does not by itself establish emissions approval.
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2020 | Subaru | WRX | Base |
| 2015-2020 | Subaru | WRX | Limited |
| 2015-2020 | Subaru | WRX | Premium |