aFe 21-91127 Magnum FLOW Pro DRY S Universal Air Filter (4.5" x 9")

Vehicle Fitment

• Universal Fit - Designed for compatible aftermarket air intake systems with ~4.5" inlet flange (Not vehicle-specific; verify fitment with your intake before installation)

Features

• Magnum FLOW Pro DRY S oil-free synthetic media for excellent airflow and easy maintenance
• Three layers of progressively finer mesh media for improved dust capture
• Washable and reusable for multiple cleaning cycles and long service life
• Pliable polyurethane flange with integrated bump seal for a secure, leak-free fit
• Deep, open pleat, inverted conical shape increases usable surface area
• High filtration efficiency (~99.2%) for superior engine protection
• Durable 100 % polyurethane top and base construction
• Universal design fits many aftermarket cold air and short ram intake systems

Specifications

• Part Number: 21-91127
• Filter Media: Pro DRY S synthetic, oil-free
• Flange Inside Diameter: 4.50 in
• Base Outside Dimensions: ~9.00 x 7.50 in
• Top Outside Dimensions: ~6.75 x 5.50 in
• Filter Height: ~9.00 in
• Shape: Oval inverted conical performance filter
• Reusable/Washable: Yes
• Filtration Efficiency: ~99.2 %

Included Components

• 1x aFe Magnum FLOW Pro DRY S Universal Air Filter (21-91127)

Product Description

The aFe 21-91127 Magnum FLOW Pro DRY S Universal Air Filter is a high-flow performance air filter element engineered to enhance airflow and filtration efficiency in compatible aftermarket intake systems. Featuring three layers of advanced synthetic Pro DRY S media, this oil-free filter delivers strong airflow while effectively capturing dust and contaminants, helping protect your engine and improve throttle response compared with restrictive stock filters. Its washable and reusable design significantly reduces long-term maintenance costs.

Constructed with a pliable polyurethane flange featuring integrated bump seals and a robust top and base, the 21-91127 forms a secure, leak-free fit when clamped into compatible intake openings. The inverted oval conical shape with deep pleats increases usable surface area for enhanced dust holding capacity and extended service intervals. Because this is a universal filter element rather than vehicle-specific, always verify that your intake system's flange size and shape match this filter before installation for proper fit and performance.