aFe 21-91031 Magnum FLOW Pro DRY S Universal Air Filter (5" Flange)

Vehicle Fitment

• Universal Fit - Designed for compatible performance and aftermarket intake systems with ~5" inlet flange (Not vehicle-specific; verify fitment with intake manufacturer before installation)

Features

• Magnum FLOW Pro DRY S oil-free synthetic media for excellent airflow and easy maintenance
• Washable and reusable design for multiple cleaning cycles and extended service life
• Pliable polyurethane flange with integrated bump seals for a secure, leak-free fit
• Deep, open pleat conical design increases usable surface area
• Conical performance shape enhances engine breathing compared with stock filters
• High filtration efficiency with excellent dust holding capacity
• Durable 100 % polyurethane top and base construction
• Universal design fits many aftermarket cold air and performance intake systems

Specifications

• Part Number: 21-91031
• Filter Media: Pro DRY S synthetic, oil-free
• Flange Inside Diameter: 5.00 in
• Base Outside Diameter: ~8.50 in
• Top Outside Diameter: ~6.00 in
• Filter Height: ~7.00 in
• Shape: Conical performance air filter
• Reusable/Washable: Yes

Included Components

• 1x aFe Magnum FLOW Pro DRY S Universal Air Filter (21-91031)

Product Description

The aFe 21-91031 Magnum FLOW Pro DRY S Universal Air Filter is a high-flow performance filter element engineered to enhance airflow and filtration efficiency in compatible aftermarket intake systems featuring a ~5" inlet flange. Its advanced Pro DRY S oil-free synthetic media allows for strong airflow while capturing dust and contaminants effectively - supporting improved engine breathing and throttle response compared with restrictive stock filters. The washable and reusable design simplifies maintenance and helps reduce long-term costs.

Constructed with a pliable polyurethane flange featuring integrated bump seals and a rugged top and base, the 21-91031 forms a secure, leak-free fit when clamped into performance intake openings. The deep, open pleat conical design increases usable surface area for improved dust holding capacity and extended service intervals. Because this filter is a universal-fit element rather than vehicle-specific, always verify that the filter's flange size and shape match your intake system before installation to ensure proper fit and performance.