aFe Magnum FLOW Universal Clamp-On Conical Air Filter with Pro DRY S Media, Part Number 21-40011

With three layers of progressively finer mesh synthetic media between 100% polyurethane top and base, this high flow, "oil-free" conical performance filter provides maximum convenience and easy maintenance with excellent airflow. Washable and reusable for multiple cleanings, the tall open evenly spaced pleats provide excellent dust holding capacity for longer service cycle between cleanings. Pliable polyurethane flange with integrated bumps insures tight, no leak seal over the life of the filter. This filter has a 99.2% filter efficiency. Magnum FLOW Universal Clamp-On Air Filter w/ Pro DRY S Media 4 IN F x 6 IN B x 4-3/4 IN T x 7 IN H

• Maximum Convenience and Easy Maintenance With Excellent Airflow
• 100% Polyurethane Frame On All Sides For Extra Long Filter Life
• Washable And Reusable For Multiple Cleaning Cycles
• Maximum Airflow for Maximum Performance Gains
• Pliable Polyurethane Flange w/Integrated Bump
• Filter Washes Clean With Soap and Water

The aFe Magnum FLOW Universal Clamp-On Conical Air Filter is designed to deliver strong airflow and dependable filtration for automotive intake systems. Featuring Pro DRY S synthetic media, this performance filter uses three progressively finer layers between a 100% polyurethane top and base to achieve a 99.2% filtration efficiency without requiring filter oil. Its universal clamp-on design makes it a practical choice for custom and modified intake applications using a compatible 4-inch inlet.

Open, evenly spaced pleats provide excellent dust-holding capacity and help support longer service intervals between cleanings. The filter’s polyurethane construction resists wear and helps maintain its shape over time, while the pliable polyurethane flange and integrated sealing bumps promote a tight, leak-resistant connection. The tall conical profile is engineered to maximize usable filter surface area and support improved intake airflow for performance-focused vehicles.

Maintenance is straightforward: the aFe Pro DRY S media can be washed with soap and water, allowed to dry, and reused through multiple cleaning cycles. No filter oil is required, helping simplify servicing and reducing the risk of over-oiling nearby intake components. This filter is intended for off-road, racing, or other applications where applicable emissions requirements permit its use. It is not CARB approved and may not be legal for sale or use on pollution-controlled vehicles in certain locations. The package includes one aFe Magnum FLOW universal clamp-on air filter.

Product Specifications and Technical Data

• Brand: aFe
• Product Line: Magnum FLOW
• Part Number: 21-40011
• Filter Type: Universal clamp-on conical performance air filter
• Filter Media: Pro DRY S multilayer synthetic media
• Filter Efficiency: 99.2 percent
• Filter Service: Washable and reusable; clean with soap and water
• Inlet Size: 4 inches

What's Included

• One aFe Magnum FLOW universal clamp-on conical air filter

Features:

• High-Flow Performance: Maximizes airflow to support improved intake performance and engine breathing.
• Oil-Free Pro DRY S Media: Three layers of progressively finer synthetic media provide effective filtration without filter oil.
• Washable and Reusable: Cleans with soap and water for multiple maintenance cycles and convenient long-term use.
• Durable Polyurethane Construction: 100% polyurethane top, base, and flange provide extended service life and a tight, leak-resistant seal.

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1