aFe Power 21-91147 Magnum FLOW Pro DRY S Air Filter (5.5" x 8" x 9")

Vehicle Fitment

• Universal - clamp-on / Momentum-series intake applications

Features

• Three-layer synthetic Pro DRY S media (oil-free)
• Washable and reusable multiple times
• 100% polyurethane frame for durability and consistent seal
• Inverted top design for increased surface area
• Deep, open pleats to maximize dust-holding capacity
• Pliable flange with integrated bump-seal for leak-free fitment
• Built-in expanded metal support prevents media collapse / damage
• Improves airflow, throttle response, and performance

Specifications

• Part Number: 21-91147
• Flange Inside Diameter: 5.5"
• Base Outside Diameter: 8.0"
• Top Outside Diameter: 8.0" (inverted)
• Height: 9.0"
• Media: 3-layer synthetic, dry (oil-free)
• Seal Material: Polyurethane
• Washable: Yes - use soap & water
• Filtration Efficiency: ≈ 99.2% (typical for this media)
• Warranty: Limited lifetime for filter (per aFe policy)

Included Components

• 1x aFe Power Magnum FLOW Pro DRY S Air Filter (PN 21-91147)

Product Description

The aFe Power Magnum FLOW Pro DRY S Air Filter (part number 21-91147) is a high-performance, universal replacement designed for clamp-on or Momentum-series intake systems. Its three-layer synthetic media delivers excellent filtration without the need for oil, making maintenance hassle-free and clean.

Built with a robust polyurethane frame and an inverted top design, this filter offers ample surface area for superior airflow and greater dust-holding capacity. The deep pleats and pliable bump-seal ensure a secure fit and maximize performance over long service intervals.

Washable and reusable, the 21-91147 offers long-term value. It's ideal for street-driven vehicles or lightly modified setups where ease of maintenance and reliable airflow are key. Make sure your intake accepts a 5.5"-ID flange before purchasing.