aFe 21-91018 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 cleanings and long service life
• Pliable polyurethane flange with integrated bumps for a secure, leak-free fit
• Deep, open pleat conical design increases usable surface area for improved dust holding capacity
• Conical performance shape enhances engine breathing 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 servicing

Specifications

• Part Number: 21-91018
• 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

Included Components

• 1x aFe Magnum FLOW Pro DRY S Universal Air Filter (21-91018)

Product Description

The aFe 21-91018 Magnum FLOW Pro DRY S Universal Air Filter is a high-flow performance filter element engineered to boost airflow and filtration efficiency in compatible aftermarket intake systems with a ~6" inlet flange. Featuring advanced Pro DRY S synthetic media, this filter delivers excellent airflow while effectively capturing dust and contaminants, supporting improved engine breathing and throttle response over restrictive stock filters. Its washable and reusable design significantly reduces long-term maintenance costs compared with disposable paper elements.

Constructed with a pliable polyurethane flange equipped with integrated bump seals and a durable top and base, the 21-91018 creates a secure, leak-free seal when clamped into performance intake openings. The conical shape and deep, open pleat design maximize usable surface area, increasing dust holding capacity and extending service intervals. As this is a universal fit filter element rather than vehicle-specific, always verify that your intake system matches the filter's flange size before installation to ensure proper fit and performance.