aFe 21-91040 Magnum FLOW Pro DRY S Universal Air Filter (6" Flange)

Vehicle Fitment

• Universal Fit - Designed for compatible aftermarket performance intake systems with ~6" inlet flange (Not vehicle-specific; verify fitment with your intake before installation)

Features

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

Specifications

• Part Number: 21-91040
• Filter Media: Pro DRY S synthetic, oil-free
• Flange Inside Diameter: 6.00 in
• Base Outside Diameter: ~9.00 in
• Top Outside Diameter: ~7.00 in
• Filter Height: ~7.25 in
• Shape: Conical performance air filter
• Reusable/Washable: Yes
• Filtration Efficiency: High flow with strong dust capture

Included Components

• 1x aFe Magnum FLOW Pro DRY S Universal Air Filter (21-91040)

Product Description

The aFe 21-91040 Magnum FLOW Pro DRY S Universal Air Filter is a high-flow performance air filter element engineered to improve airflow and filtration efficiency in compatible aftermarket intake systems featuring a ~6" inlet flange. Its advanced Pro DRY S oil-free synthetic media delivers excellent airflow while effectively capturing dust and contaminants, helping support enhanced engine breathing and throttle response compared with restrictive stock paper filters. The washable and reusable design makes maintenance simple and cost-effective over many service cycles.

Constructed with a pliable polyurethane flange with integrated bump seals and a rugged polyurethane top and base, the 21-91040 creates a secure, leak-free fit when clamped into performance intake openings. The conical design with deep, open pleats increases usable surface area for enhanced dust holding capacity and longer service intervals. Because this is a universal fit filter element rather than vehicle-specific, always verify that your intake system's flange size and shape match this filter before installation to ensure proper fit and performance.