aFe 21-40507 MagnumFLOW Pro DRY S Conical Air Filter 4F x 6B x 4T x 7H

Vehicle Fitment

• Universal Fit - compatible with any cold air intake, short ram intake, or custom intake system with a 4.0" inside diameter inlet opening; recommended for use with aFe intake system P/N 51-11112

Fitment Notes

• Universal fitment - not vehicle-specific. Customer must verify that the intake tube or coupler has a 4.0" inside diameter opening to accept the filter's flange.
• Clamp-on style - compatible with any intake tube measuring 4.0" I.D. at the mounting point.
• Recommended for use with aFe intake system P/N 51-11112 as a direct replacement or upgrade filter.
• Pro DRY S media is oil-free - no filter oil required. Do not apply filter oil to this filter.
• Includes a coupler for installation flexibility.

Features

• Three layers of progressively finer mesh synthetic media for optimum filtration and airflow, even when dirty
• Oil-free Pro DRY S design - no oiling required, no risk of MAF sensor contamination
• Tall, evenly spaced open pleats maximize dust-holding capacity for extended service intervals between cleanings
• 100% polyurethane top and base frame for long filter life and structural rigidity
• Pliable polyurethane flange with integrated bumps ensures a tight, leak-free seal against the intake tube
• Washable and reusable - cleans easily with soap and water for multiple service cycles
• 99.2% filter efficiency for maximum engine protection without sacrificing flow
• Conical shape maximizes filter surface area within a compact footprint

Specifications

• Filter Style: Conical, Clamp-On
• Flange Inside Diameter (Inlet): 4.0"
• Base Diameter: 6.0"
• Top Diameter: 4.0"
• Height: 7.0"
• Filter Media: Non-Woven Synthetic (3-Layer Progressive)
• Media Type: Pro DRY S (Oil-Free)
• Filter Efficiency: 99.2%
• Filter Color: Gray
• Frame Material: 100% Polyurethane
• Flange Position: Center
• Washable: Yes / Reusable: Yes / Pre-Oiled: No
• UPC: 802959210529

Included Components

• 1x aFe MagnumFLOW Pro DRY S Conical Air Filter (21-40507)
• 1x Coupler

Product Description

The aFe 21-40507 MagnumFLOW Pro DRY S is a universal conical clamp-on air filter designed for performance intake systems, cold air kits, and custom intake fabrication projects requiring a 4.0" inlet. Its three-layer progressive synthetic media delivers 99.2% filter efficiency and high airflow in a completely oil-free design - eliminating the mess and MAF sensor contamination risks associated with oiled filters. The polyurethane-framed construction provides long-term structural integrity, while the pliable flanged base with integrated bump seals conforms tightly to the intake tube for a leak-free, clamp-on fit without sealants or gaskets.

The Pro DRY S media's tall, open pleats maximize dust-holding capacity for longer service intervals, and the filter washes clean with soap and water and returns to full performance after drying. Sized at 4" flange x 6" base x 4" top x 7" height, it is the recommended replacement filter for aFe intake system P/N 51-11112, though it is compatible with any 4.0" I.D. intake tube. Includes a coupler for added installation flexibility.