K&N 33-2438 Engine Air Filter

K&N 33-2438 Replacement Air Filter

The K&N 33-2438 is a washable, reusable high-flow engine air filter built with layered oiled cotton gauze media. It installs in the factory air box and is engineered to improve airflow while capturing contaminants for long-term service.

Key Features

• Cotton gauze panel air filter with a flexible frame design
• Pre-oiled and ready for service out of the box
• Washable and reusable for extended use
• Outside dimensions: 12.5 in. length x 9.188 in. width x 1.75 in. height
• Re-oiling amount: 2.32 oz (69 ml)
• Includes 1 air filter in a box package
• Backed by a 1,000,000-mile/10-year limited warranty

Detailed Description

Built as a drop-in replacement air filter, the K&N 33-2438 is made for drivers who want a serviceable engine air filter that works with the factory air box. The layered cotton media is designed to balance airflow and contaminant capture, and the panel-style construction supports a direct-fit installation in select Toyota and Lexus applications. This part number is commonly searched as K&N 33-2438 for Toyota 4Runner, Lexus GX460, and Toyota FJ Cruiser replacement air filter applications.

This part cross-references Baldwin PA4435 for the same application.

What It Helps Address

• Restricted airflow from a dirty or clogged factory air filter
• Frequent replacement of disposable paper filters
• Loss of intake efficiency caused by a worn filter element
• Need for a reusable engine air filter service interval
• Direct replacement requirements for select Toyota 4Runner and Lexus GX460 setups

Installation Notes and Tips

• Fits 2023-2024 Toyota 4Runner, N/A
• Fits 2010-2022 Toyota 4Runner, N/A
• Fits 2010-2014 Toyota FJ Cruiser, N/A
• Fits 2023 Lexus GX460, N/A
• Fits 2010-2022 Lexus GX460, N/A
• Install into the factory air box as a drop-in replacement
• Clean and re-oil the filter according to K&N service intervals and the specified re-oiling amount
• Verify air box sealing surfaces before installation

Quality Assurance

K&N backs the 33-2438 with a 1,000,000-mile/10-year limited warranty. The filter is engineered for repeated cleaning and reuse, making it a long-service replacement for select Toyota 4Runner, Lexus GX460, and Toyota FJ Cruiser applications. Part number 33-2438 is also referenced in aftermarket catalogs for direct replacement use.