aFe 21-90028 Magnum FLOW Pro DRY S Universal Air Filter (4.5" Flange)

Vehicle Fitment

• Universal Fit - Designed for compatible performance intake systems with a 4.5" inlet (Not vehicle-specific; verify with intake manufacturer)

Features

• Pro DRY S synthetic, oil-free air filter media for easy maintenance and high airflow
• Three layers of progressively finer mesh for improved dust capture and airflow
• Washable and reusable design for multiple cleaning cycles and long service life
• Pliable polyurethane flange with integrated bump seal for leak-free installation
• Deep, open pleat design increases usable surface area
• Conical performance shape enhances airflow over stock filters
• Durable 100 % polyurethane top and base construction
• Universal design fits many aftermarket cold air and short ram intake systems

Specifications

• Part Number: 21-90028
• Filter Media: Pro DRY S synthetic, oil-free
• Flange Inside Diameter: 4.5 in
• Base Outside Diameter: 8.5 in
• Top Outside Diameter: 7 in
• Filter Height: 8 in
• Shape: Conical performance air filter
• Reusable/Washable: Yes

Included Components

• 1x aFe Magnum FLOW Pro DRY S Universal Air Filter (21-90028)

Product Description

The aFe 21-90028 Magnum FLOW Pro DRY S Universal Air Filter is a high-flow performance air filter engineered to improve airflow and filtration efficiency in compatible aftermarket intake systems. Featuring advanced Pro DRY S synthetic media with three layers of progressively finer mesh, it delivers excellent dust capture while maintaining strong airflow for improved throttle response and engine performance. Its construction includes a pliable polyurethane flange with integrated bump seals that create a secure, leak-free fit at the intake opening.

Designed for convenience, the 21-90028 is washable and reusable, reducing long-term maintenance costs compared with disposable filters. The conical shape and deep, open pleats increase usable surface area, extending service intervals. Because this filter is universal and not tied to a specific vehicle model, always verify that the filter's 4.5" inlet flange matches your intake system before installation for optimal performance.