AEM 28-20438 DryFlow Drop-In Air Filter 2010-2024 Toyota 4Runner FJ Cruiser 4.0L

Vehicle Fitment

• 2010-2024 Toyota 4Runner - 4.0L V6 (1GR-FE) - all trims including SR5, TRD Sport, TRD Off-Road, Limited, TRD Pro
• 2010-2014 Toyota FJ Cruiser - 4.0L V6 (1GR-FE)
• 2010-2023 Lexus GX460 - 4.6L V8 (sharing the same OEM airbox filter dimensions; confirm via AEM fitment tool)
• 2010-2015 Toyota Land Cruiser Prado - 4.0L V6 (1GR-FE; international market; confirm fitment for your region)

Fitment Notes

• Direct drop-in replacement for the factory engine air filter - installs in the existing OEM airbox with no modifications required.
• NOT CARB Compliant - Not for street use in California, New York, or Maine. The 28-20438 is not legal for installation on vehicles required to meet CARB emissions standards. Confirm legal status for your state before purchasing.
• AEM's own title covers 2010-2019 Toyota 4Runner. Multiple dealers confirm fitment extends to the current-generation 2020-2024 4Runner, which continues to use the same 4.0L 1GR-FE engine and airbox dimensions. Always verify your specific year against AEM's fitment lookup before ordering.
• Note: The 2010-2019 Toyota 4Runner covered by this filter replaces the previous-generation 28-20281 application (2002-2009 4Runner with the same 4.0L 1GR-FE engine, but a different airbox filter size). The 28-20438 is the correct filter for 2010+ fifth-generation 4Runner models.
• This filter will not void your Toyota, Lexus, or Lincoln factory vehicle warranty.
• Sold individually - one filter per package.

Features

• AEM DryFlow Oil-Free Synthetic Media - Up to 99% Filtration Efficiency: The 28-20438 uses AEM's DryFlow non-woven synthetic filter media, delivering high airflow and up to 99% contaminant capture efficiency without requiring filter oil. Eliminates the risk of MAF sensor contamination from oil overspray on Toyota's 1GR-FE and Lexus V8 mass airflow-metered engines, and the synthetic media does not degrade from repeated cleaning cycles.
• Increased Horsepower and Throttle Response: AEM's lower-restriction synthetic media allows more air volume into the Toyota 4.0L 1GR-FE and Lexus 4.6L V8 engines compared to the factory paper element - improving throttle response and supporting power gains across the rev range for both stock and modified builds.
• Large-Format Panel - 12.625 in x 9.25 in: The large panel provides substantial filter media surface area for the high airflow demands of Toyota's 1GR-FE V6 and the Lexus GX460 V8 across this broad multi-model application range.
• Outstanding Performance in Off-Road and Dusty Conditions: DryFlow synthetic media maintains both airflow and filtration efficiency in the dusty, trail, and off-road conditions common to 4Runner and FJ Cruiser use - performing consistently under heavy particulate loading between cleaning cycles.
• Shed-and-Flow Design: Non-woven media sheds trapped dirt under engine vibration, maintaining consistent airflow as the filter accumulates contaminants - unlike cotton-gauze filters that progressively restrict flow as dirt builds up.
• Washable and Reusable - Lifetime Filter: Clean with AEM filter cleaner (PN 1-1000), rinse with water, air dry completely, and reinstall - no oiling required. Designed to last the lifetime of the vehicle.
• Direct Drop-In Fit: Engineered as a direct dimensional replacement for the OEM paper element in the factory Toyota/Lexus airbox - no modifications, adapters, or additional hardware required.
• Will Not Void Factory Warranty: The 28-20438 will not void the Toyota or Lexus manufacturer's vehicle warranty when used as directed.
• Made in the USA: Manufactured by AEM Induction Systems to precision quality standards.

Specifications

• Part Number: 28-20438
• Brand: AEM Induction Systems
• Product Type: DryFlow Drop-In OEM Replacement Panel Air Filter
• Filter Shape: Panel (flat)
• Filter Material: Non-Woven Synthetic (DryFlow - oil-free)
• Color: Red
• Outside Length: 12.625 in (321mm)
• Outside Width: 9.250 in (235mm)
• Height: 1.563 in (39.7mm)
• CARB Compliance: Not CARB compliant - not for street use in CA, NY, or ME
• Oiling Required: No
• Washable / Reusable: Yes
• Filtration Efficiency: Up to 99%
• Country of Manufacture: USA
• Warranty: Lifetime Limited
• Quantity: 1 (sold individually)

Included Components

• 1x AEM DryFlow OEM Replacement Panel Air Filter (28-20438)

Product Description

The AEM 28-20438 is a DryFlow synthetic drop-in panel air filter for the fifth-generation Toyota 4Runner (2010-2024) equipped with the 4.0L V6 (1GR-FE), the 2010-2014 Toyota FJ Cruiser (4.0L V6), and the 2010-2023 Lexus GX460 sharing the same OEM airbox dimensions. The 12.625 x 9.25-inch panel fits directly into the factory Toyota/Lexus airbox as a dimensional replacement for the OEM paper element with no modifications required.

AEM DryFlow oil-free synthetic media delivers up to 99% filtration efficiency without requiring filter oil - eliminating MAF sensor contamination risk and improving airflow into the 1GR-FE for improved throttle response and power output over the factory paper element. The DryFlow media is particularly well suited to the off-road, trail, and dusty-environment conditions common to 4Runner and FJ Cruiser use. Washable with AEM filter cleaner and reusable for the lifetime of the vehicle. Will not void Toyota or Lexus factory warranty. Made in the USA. Lifetime Limited Warranty.

Not CARB compliant - not for street-registered vehicles in California, New York, Maine, or other CARB-adopting states. Confirm legal status for your state before purchasing.