K&N High-Flow Engine Air Filter for Toyota/Lexus GX460 & 4Runner — 33-2438 Washable, Lifetime Warranty

K&N High-Flow Original Lifetime Engine Air Filter (33-2438) is a washable, reusable drop-in filter engineered to increase airflow and help improve engine performance for compatible Toyota and Lexus models.

This premium replacement filter is built from multi-layer cotton gauze media and crafted to fit directly into your factory air box for a fast, no-fuss upgrade. Designed, tested and manufactured with durable materials in the USA, the K&N 33-2438 is backed by a limited lifetime warranty and intended to reduce disposable filter waste by remaining serviceable for the life of your vehicle.

How does this filter affect engine breathing and performance?

The K&N high-flow media allows more air to pass into the intake without sacrificing filtration efficiency, which can help the engine maintain better throttle response and support horsepower gains. Increased airflow supports combustion consistency under load and can benefit acceleration and drivability.

• Multi-layer cotton gauze media increases airflow up to the brand’s tested margins.
• Designed to fit factory air boxes for proper sealing and airflow paths.
• Engineered and tested on race tracks to validate durability and flow characteristics.

How often will I need to service the K&N filter?

Under normal highway driving, the filter typically requires cleaning about every 75,000 miles, which translates to roughly once every five years for many drivers. Cleaning intervals depend on driving conditions—dusty, off-road or heavy stop-and-go use will need earlier inspection and maintenance.

• Standard cleaning recommended about every 75,000 miles in typical highway use.
• Inspect sooner after heavy off-road or dusty conditions.
• Reusable design reduces frequency and cost compared with disposable filters.

Is installation difficult and will it fit my vehicle?

The K&N 33-2438 is a direct replacement engineered to drop into the factory air box of listed Toyota and Lexus models, so installation is generally quick and requires only basic hand tools. Pre-treated at the factory, it’s ready to install immediately—no break-in or special procedures are needed beyond following your vehicle’s airbox reassembly steps.

• Factory-fit design for 2010–2023 Lexus GX460 and compatible 2010–2024 Toyota models.
• Pre-oiled and ready to install straight from the package.
• Typical install time is a few minutes with standard tools.

What are the long-term benefits and warranty coverage?

Because the filter is washable and reusable, it reduces recurring filter purchases and landfill waste while delivering durable performance over many years. K&N backs this product with a limited lifetime warranty to cover defects in materials and workmanship under normal use, subject to terms and limitations.

• Washable and reusable to limit disposable filter waste.
• Durable materials and construction intended to last the vehicle’s life.
• Limited lifetime warranty provided by K&N (limitations apply).

Who is this for: The K&N 33-2438 is ideal for owners of the listed Toyota and Lexus models who want a durable, washable replacement that can improve airflow and reduce recurring filter costs. It suits daily drivers seeking a simple OEM-fit upgrade, off-road enthusiasts who need a robust filter, and long-term vehicle keepers looking to minimize waste and maintenance expense.