AEM Dryflow Performance Air Filter 21-204BF – 89 mm Inlet
The AEM Dryflow 21-204BF is a high-quality universal performance air filter from the AEM Brute Force range. This tapered conical air filter is designed for applications where high airflow, effective filtration and durable construction are essential. Its advanced synthetic Dryflow filtration media helps protect the engine from dirt and airborne contaminants without requiring filter oil.
Featuring an 89 mm (3.5 inch) inlet diameter and an overall height of 133 mm, the AEM 21-204BF is suitable for various custom air intake systems. Its compact conical design makes it particularly useful for motorsport, performance tuning and off-road applications where installation space may be limited.
Brute Force Dryflow Technology – Oil-Free Air Filtration
AEM Dryflow air filters use specially developed non-woven synthetic filtration media. This material is engineered to combine efficient airflow with effective filtration, helping capture dust, dirt and other particles before they enter the engine.
Unlike conventional oiled cotton performance filters, the AEM Dryflow 21-204BF operates without filter oil. This eliminates the need for re-oiling after cleaning and avoids potential contamination caused by excessive filter oil in the air intake system.
Washable and Reusable Performance Air Filter
The AEM Dryflow Powerfilter is designed for long-term use. Its synthetic filter element can be cleaned and reused, reducing the need for frequent filter replacement during routine maintenance.
For maintenance, use a suitable cleaning product specifically designed for AEM Dryflow filters. After cleaning, allow the filter to dry completely before reinstalling it. Filter oil is not required and should not be applied to this synthetic filter element.
Compact Conical Design with Durable Construction
The tapered conical shape of the AEM 21-204BF provides a large filtration surface relative to its compact dimensions. The filter features a base outside diameter of 152 mm and a top outside diameter of 130 mm.
An internal support structure helps maintain the shape and stability of the filter element under demanding operating conditions. The centred rubber mounting flange provides a secure connection to a compatible air intake pipe.
AEM 21-204BF Technical Specifications
- Brand: AEM
- Part number: 21-204BF
- Series: Brute Force Dryflow
- Product type: universal conical performance air filter
- Flange inside diameter: 89 mm (3.5 inch)
- Overall height: 133 mm (5.25 inch)
- Base outside diameter: 152 mm
- Top outside diameter: 130 mm
- Flange length: 35 mm
- Flange position: centred
- Filter material: non-woven synthetic
- Internal support structure: yes
- Filter oil required: no
- Washable: yes
- Reusable: yes
- Application: universal
- Package contents: 1 air filter
Universal Fitment for Motorsport and Performance Applications
The AEM Dryflow 21-204BF is intended for universal installations using a suitable 89 mm air intake connection. It can be used in custom intake systems for performance road cars, race vehicles, off-road applications and other modified engine configurations.
Before installation, verify the available mounting space, filter dimensions and intake pipe compatibility. Position the filter where it can receive sufficient cool air while being protected from excessive engine heat and direct water exposure.
Buy the AEM Dryflow 21-204BF Performance Air Filter
Looking for a reliable performance air filter with an 89 mm inlet? The AEM Dryflow 21-204BF combines durable synthetic filtration technology with a compact conical design and easy oil-free maintenance. Its washable and reusable construction makes it an excellent choice for custom air intake systems, performance tuning and motorsport applications.
