AEM 21-2058DK DryFlow 4 in Clamp-On Air Filter 6 in OD x 7 in H Universal

Vehicle Fitment

• Universal - fits any cold air intake, short ram intake, or intake tube with a 4.000 in (102mm) outside diameter pipe end
• Suitable for use as a replacement filter on existing AEM cold air intake systems, or as a primary filter element on custom intake builds using 4-inch intake tubing
• Compatible with carbureted and fuel-injected engines; gasoline, diesel, and alternative fuel applications
• Some adaptation may be required depending on installation - confirm pipe OD matches the 4.000 in flange ID before ordering

Fitment Notes

• The 21-2058DK is a clamp-on universal filter - it is not a vehicle-specific drop-in panel filter. It requires a 4.000 in (102mm) OD intake tube or pipe end. Secure with a standard hose clamp (not included) over the 1.438 in flange length.
• Filter dimensions: 6.000 in OD base, 5.125 in OD top, 7.000 in height. Ensure adequate under-hood or intake tube clearance for the full 7-inch filter body before installation.
• The flange is centered at 0-degree offset - the filter mounts straight onto the intake pipe with no angular offset. For angled or offset flange configurations, see other AEM DryFlow universal filter variants.
• For replacement filters on AEM cold air intake systems, verify this part number matches the original filter shipped with your specific AEM intake kit before ordering.

Features

• AEM DryFlow Oil-Free Synthetic Media - Up to 99% Filtration Efficiency: The 21-2058DK uses AEM's DryFlow non-woven synthetic filter media to deliver high airflow and up to 99% contaminant capture efficiency without requiring filter oil. Unlike oiled cotton-gauze performance filters, DryFlow eliminates the risk of MAF sensor contamination from oil overspray, and the synthetic media does not degrade from repeated cleaning cycles the way cotton gauze can.
• Reinforced Internal Cage - Lighter and Stronger Than Mesh: The internal support structure uses a reinforced cage design that is both lighter and structurally stronger than conventional wire mesh cages - resisting collapse under high airflow and engine vacuum conditions while reducing overall filter weight.
• Urethane Body - Won't Shrink or Crack: The filter body is constructed from urethane rather than conventional plastisol-based compounds. Urethane maintains its shape and sealing properties across the full temperature range of automotive applications - it will not shrink over time or crack from heat cycling the way plastisol-based filter bodies can.
• Integrated Velocity Stack in Flange Neck: The 4-inch flange incorporates an integrated velocity stack profile in the inlet neck, which increases the structural rigidity of the flange while simultaneously smoothing and accelerating airflow into the filter body - improving overall filter flow capacity compared to a plain cylindrical flange.
• Closed Rubber Top Cap - Filter Top for Higher Airflow: The closed rubber top cap seals the top of the filter, directing all incoming air through the full 7-inch height of the cylindrical filter media rather than allowing short-circuit flow through an open top. This maximizes the available filter surface area and airflow capacity of the 6-inch OD body.
• Flexible Frame Design: The flexible internal cage accommodates minor installation variations and allows the filter to conform slightly to tight under-hood spaces without deforming the filter media or compromising its seal on the intake pipe.
• Washable and Reusable - Lifetime Filter: AEM DryFlow universal filters are washable with AEM filter cleaner (PN 1-1000), rinsed with water, and air dried - no re-oiling required. Designed to last for the life of the vehicle or intake system.
• Made in the USA: Manufactured by AEM Induction Systems to precision quality standards.

Specifications

• Part Number: 21-2058DK
• Brand: AEM Induction Systems
• Product Type: DryFlow Universal Clamp-On Air Filter
• Filter Shape: Round (cylindrical with slight taper)
• Filter Material: Non-Woven Synthetic (DryFlow - oil-free)
• Flange Inside Diameter: 4.000 in (102mm) - fits 4-inch OD intake pipe
• Flange Length: 1.438 in (37mm)
• Flange Angle: 0 degrees (centered, straight)
• Flange Type: Centered (1 flange)
• Outside Diameter (Base): 6.000 in (152mm)
• Outside Diameter (Top): 5.125 in (130mm)
• Height: 7.000 in (178mm)
• Top Style: Rubber cap (closed)
• Frame Design: Flexible reinforced internal cage
• Oiling Required: No
• Washable / Reusable: Yes
• Filtration Efficiency: Up to 99%
• Country of Manufacture: USA
• UPC: 024844335081
• Warranty: Lifetime Limited
• Quantity: 1 (sold individually)

Included Components

• 1x AEM DryFlow Universal Clamp-On Air Filter (21-2058DK)
• Note: Intake pipe, hose clamp, and heat shield sold separately

Product Description

The AEM 21-2058DK is a universal DryFlow clamp-on air filter for 4-inch intake tubing - a 6-inch OD, 7-inch tall cylindrical filter body with a closed rubber top cap, designed for use on custom intake builds, cold air intake systems, or as a direct replacement filter element on existing AEM intakes using 4-inch pipe. It is a clamp-on universal filter, not a vehicle-specific drop-in panel filter.

AEM's DryFlow oil-free synthetic media delivers up to 99% filtration efficiency without requiring filter oil - eliminating MAF sensor contamination risk and simplifying maintenance to a wash-and-reinstall cycle. The reinforced internal cage, urethane body construction, and integrated velocity stack in the flange neck provide structural integrity and consistent airflow performance across the full height of the 7-inch filter body. The closed rubber top cap maximizes usable filter surface area by directing all airflow through the cylindrical media walls.

Fits any 4.000 in (102mm) OD intake tube. Some adaptation may be required depending on the installation. Secured with a standard hose clamp over the 1.438 in flange. Washable and reusable for the life of the vehicle. Made in the USA. Backed by AEM's Lifetime Limited Warranty.