aFe 21-91021 Magnum FLOW Pro DRY S Universal Air Filter (6" Flange)

Vehicle Fitment

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

Features

• Magnum FLOW Pro DRY S oil-free synthetic media for high airflow and easy maintenance
• Washable and reusable design for multiple cleaning cycles and extended filter life
• Pliable polyurethane flange with integrated bumps for a secure, leak-free seal
• Deep, open pleat design increases usable surface area for enhanced dust holding capacity
• Conical performance shape enhances airflow compared with restrictive stock filters
• Durable 100 % polyurethane top and base construction
• Universal design fits many aftermarket cold air, short ram, and performance intake systems
• Oil-free media eliminates messy oil application during service

Specifications

• Part Number: 21-91021
• 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: ~7.00 in
• Shape: Conical performance air filter
• Reusable/Washable: Yes

Included Components

• 1x aFe Magnum FLOW Pro DRY S Universal Air Filter (21-91021)

Product Description

The aFe 21-91021 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 an approximate 6" inlet flange. Featuring advanced Pro DRY S oil-free synthetic media, this filter balances excellent airflow with effective dust capture, helping support enhanced engine breathing and throttle response compared with restrictive stock paper filters. Its washable and reusable design helps lower long-term maintenance costs and extends service intervals.

Constructed with a pliable polyurethane flange equipped with integrated bump seals and a rugged polyurethane top and base, the 21-91021 creates 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 life. 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.