How often should I clean this air filter?

That depends on your driving conditions. If you drive in dusty environments, you'll need to clean it more often. aFe recommends inspecting the filter regularly and cleaning it when it appears dirty.

What is a non-oiled air filter?

A non-oiled air filter uses synthetic media to trap dirt and debris without the need for oil. This makes cleaning easier, as you don't have to re-oil the filter after washing it. It also reduces the risk of oil contaminating your mass airflow sensor.

How do I clean this air filter?

aFe recommends using their filter cleaning solution, but you can also use a mild soap and water. Gently wash the filter, rinse it thoroughly, and allow it to air dry completely before reinstalling.

aFe MagnumFLOW Air Filters OER PDS A/F PDS Subaru Impreza WRX STI 08-11 H4-2.5L

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aFe

Specifications

Brand: aFe
Part #: 31-10161
UPC: 802959311165

aFe

aFe MagnumFLOW Air Filters OER PDS A/F PDS Subaru Impreza WRX STI 08-11 H4-2.5L

Name: aFe MagnumFLOW Air Filters OER PDS A/F PDS Subaru Impreza WRX STI 08-11 H4-2.5L
Brand: aFe
Price: 76.00 USD
Availability: InStock

$76.00

On Backorder — Expected to ship by Apr 5, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Washable, reusable aFe air filter improves airflow and lasts for years.

Key Features

Non-oiled filter — easy to clean and reuse
Washable and reusable — multiple cleaning cycles
Three layers of synthetic media — maximum filtration
Urethane bump seal — creates a tight seal

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Product Details

Constructed with 100-percent polyurethane boxed frame, this non-oiled OE replacement filter provides years of hassle free service. Three Layers of Progressive Synthetic (Dry) Media for Maximum Convenience. Washable and reusable for multiple cleaning cycles, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Integrated urethane bump seal insures tight, no leak seal over the life of the filter.