What Are aFe Filters and How Do You Choose the Right One?

aFe filters are the air-filter components in aFe POWER's intake and filtration lineup, sold both as replacements for factory air boxes and as the filter element inside aFe intake systems. To choose the right one, you need three things: your vehicle's year/make/model/engine, the filter style your intake or air box accepts (panel, cone, or custom shape), and the media type you want — oiled or dry. aFe POWER states its products are dyno tested in-house and flow-bench tested, and that its line covers over 3,000 applications, so most selection work comes down to matching part numbers and dimensions rather than guessing.

Where aFe filters sit in the product line

aFe POWER's catalog groups air filters alongside cold air intake systems, exhaust systems, electronics, intercoolers, suspension, and headers. In practice, aFe filters show up in two roles:

• Inside an intake system — for example, the Momentum GT Cold Air Intake System and Magnum FORCE Stage-2 Cold Air Intake System are listed with a Pro 5R filter included, and the Takeda Stage-2 Cold Air Intake System likewise ships with a Pro 5R filter.
• As a standalone replacement filter — for example, the Magnum FORCE Intake Replacement Air Filter with D2 Dura-Dry media is listed with its own part number and physical dimensions.

That distinction matters: if you already run an aFe intake, you're usually buying a replacement element for it. If you have a stock air box, you're looking for a direct-fit replacement filter.

Oiled vs dry media: the core choice

aFe's filter naming tells you the media family. The product listings in the source material show both oiled and dry options:

The source material does not state filtration-efficiency or airflow numbers for each media, so treat any specific gain claim as something to verify on the product page for your part number rather than assume. The practical decision is simpler: oiled media adds a re-oiling step at cleaning time; dry media does not.

Matching a filter to your vehicle and intake

The listings show the pattern aFe uses to identify fitment — vehicle, year range, engine, and often the intake system it belongs to. Examples from the source:

• Momentum GT Cold Air Intake System w/ Pro 5R Filter — Ford Bronco 25-26 L4-2.3L (t)
• Magnum FORCE Stage-2 Cold Air Intake System w/ Pro 5R Filter — GM Silverado/Sierra 1500 19-26 L4-2.7L (t)
• Takeda Stage-2 Cold Air Intake System w/ Pro 5R Filter — Hyundai Kona 24-26 L4-1.6L (t)

For a standalone replacement filter, the listing instead gives flange, base, top, and height dimensions. For example, the Magnum FORCE Intake Replacement Air Filter w/ D2 Dura-Dry Media is listed as "4 IN F x 6 IN B x 4-1/2 IN T x 7-1/2 IN H," and a second listing as "4 IN F x 6 IN B x 5-1/2 IN T x 7-1/2 IN H." Those are the numbers to measure against your existing filter or air box opening.

Steps to pick the right one:

1. Identify your vehicle's year, make, model, and engine (including turbo/NA, since listings note "(t)").
2. Decide whether you're replacing a filter inside an existing aFe intake or fitting a stock air box.
3. If it's an aFe intake, match the intake system name and part number; the replacement filter is tied to that system.
4. If it's a stock air box, compare the listed flange/base/top/height dimensions to your current filter.
5. Choose oiled (Pro 5R) or dry (D2 Dura-Dry) based on whether you want an oiling step in your maintenance routine.

Expected result: a filter whose dimensions and fitment line up with your air box or intake, in the media type you selected.

Cleaning vs replacing

aFe POWER's site lists "Cleaning Your Air Filter" as a topic in its navigation, which confirms cleaning is part of the intended maintenance cycle for its filters rather than one-time disposable use. The source material does not specify cleaning intervals, cleaning products, or which media can be cleaned versus replaced, so check the specific product page or the cleaning section for your filter before assuming a schedule.

A reasonable decision rule based on what the listings do show: if your filter is a dry D2 Dura-Dry element, there is no oiling step to plan for; if it's a Pro 5R, plan for re-oiling as part of cleaning. If the filter is damaged or the media is compromised, replacement — not cleaning — is the path, and you'd reorder by the same part number or dimensions.

How aFe filters compare with stock/OEM filters

The source material supports these points of comparison:

• Testing: aFe states its products are dyno tested with an in-house DynoJet and that airflow products are flow-bench tested. It does not publish a stock-vs-aFe airflow comparison in the material provided.
• Maintenance model: aFe filters are presented as cleanable and, for oiled media, re-oilable, whereas a typical OEM paper filter is a replace-only item.
• Fitment scope: aFe lists over 3,000 product applications, so availability depends on whether your vehicle is covered.

What the source does not provide: filtration efficiency percentages, horsepower gains per filter, or warranty terms. If those matter to your decision, they need to come from the individual product page, not from a general assumption.

Quick selection checklist

• Vehicle year/make/model/engine confirmed, including turbo designation.
• Intake system identified if you already run aFe (Momentum GT, Magnum FORCE Stage-2, Takeda Stage-2, etc.).
• Media chosen: Pro 5R (oiled) or D2 Dura-Dry (dry).
• For standalone filters: flange, base, top, and height dimensions matched to your air box.
• Cleaning plan set based on media type, with replacement as the fallback for damaged media.